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I've installed them on tractors and just used the 3M white heavy duty velcro on the side of the battery box. We have those felt battery covers so that won't work, but I'd still just find a flat spot to velcro it on somewhere. Use that accessory stud in your photo for the feed.

I'll take a look under the hood of my truck to see if I can find a good spot that I would put them.

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I've always installed those on the inner fender. Granted, this was for trucks that had the battery in traditional front corner locations though.
 
We install bodies and aerial devices on 5500 cab/chassis’, Ford and Ram mostly. Here in Arizona we will not put resettable breakers in the engine compartment due to heat. They will deteriorate quickly. We install them under the dash or on a PDM board we install in the cab. We locate the PDM on the back wall on regular cabs and under the back seat on extended cabs.


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So just to be clear, the extra stud on that battery post can have a stackable fuse added to it then place a eyelet on top of it as was done with the two to the right. Look at the circles in the pic I attached, the little black square box under the eyelet is a Z case fuse and they are available in multiple ranges. It may not give you two circuit breakers but at least it will give you an easy spot to grab one power source.

Here is a link to Waytek for an example of the fuses https://www.waytekwire.com/item/45592/Littelfuse-ZCASE-Single-Mega-Starter/


20210623_065644.jpg
 
So just to be clear, the extra stud on that battery post can have a stackable fuse added to it then place a eyelet on top of it as was done with the two to the right. Look at the circles in the pic I attached, the little black square box under the eyelet is a Z case fuse and they are available in multiple ranges. It may not give you two circuit breakers but at least it will give you an easy spot to grab one power source.

Here is a link to Waytek for an example of the fuses https://www.waytekwire.com/item/45592/Littelfuse-ZCASE-Single-Mega-Starter/


View attachment 18193
Interesting, I’ve never seen that type of fuse before. Do you know what size those factory fuses are?
 
Interesting, I’ve never seen that type of fuse before. Do you know what size those factory fuses are?
Looking at the picture you posted the square fuse to the left looks like it says 200 amps, but I'm not sure what the factory ones are. Each fuse will typically be different depending upon what is on that circuit. To size it for what you were doing you would need to know the current draw. What are you trying to use those breakers for and what are you hooking up? The current rating will be printed on the side of the fuse typically
 
So just to be clear, the extra stud on that battery post can have a stackable fuse added to it then place a eyelet on top of it as was done with the two to the right. Look at the circles in the pic I attached, the little black square box under the eyelet is a Z case fuse and they are available in multiple ranges. It may not give you two circuit breakers but at least it will give you an easy spot to grab one power source.

Here is a link to Waytek for an example of the fuses https://www.waytekwire.com/item/45592/Littelfuse-ZCASE-Single-Mega-Starter/


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View attachment 18209

Yes sir, very familiar with that style of fuse! I have done a lot of automotive wiring, not the normal hack together with butt connectors type stuff, full on Baja trophy trucks that compete, drag cars, road race, fast "street" cars and even boats. Here's a couple pics IMG_5987.JPG
 

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