So I finished up the wiring for the switch pros today. Again, heavy thanks to
@Fishnerd and @elbarto for their build threads. They were very helpful. First is the SDHQ switch panel... this is a must. It looks like an OEM install.
I ran the wire through the firewall at the manual transmission clutch block off plate, using a cable gland to pass the wire through so its nice and weather tight.
I Tapped into the fuse box with two Mini2 fuse taps. The "light/trigger2" wire is connected to the cab clearance lights circuit, and the "ignition" wire is connected to the sunroof/rear USB circuit. A small hole with grommet allows the wiring to be neatly tucked under the PDC. I used a DT connector for easy serviceability. If everything works as planned, I may tap into the 42 pin connectors on the bottom of the PDC. I don't love the look of fuse taps.
The Harness from the Switch-Pros to the battery are loomed and labeled. I did have to make a new positive lead... the one switch pros provides wasn't long enough.
Just like
@Fishnerd, I created a harness utilizing DT connectors for future additions, and each connector has its own ground straight to battery. See his build for more detailed pics. Here is the common ground.
All of the 8 DT connectors for the switch pros are bundled behind the battery for future use. It looks like a mess, but its actually very well organized... each pair of wires is one inch shorter than the previous so they don't bunch up too bad. Labels make for quick identification.
And finally, I used insulated p clamps to help route the harness cleanly.
Same for the Switch Pros positive.
Everything looks OEM at first glance, which is exactly the way I like it.