Hey all. I've got a 2020 cummins laramie. It did not come with the factory bed lights. I am wanting to install them. I have been searching to see if have them already prewired. I have found the trailer tpms plug. Than I found a 2 wire plug that is empty on top of the crossmember. The wire colors are grey with a red stripe and black. Is this the plug I need or should there be a plug for each side. Thanks for any help