Got the stereo, tailgate handle, bushings, one mirror, t/stat housing delivered. Some items coming next week. Fitting the stereo into the bezel I had looked at the connection for the reverse camera and realized I had to look for an extension for inside the tailgate so I can remove the tailgate if needed.
So, looking at the connection on the t/gate handle, it has a 4-pin video connection. I ordered a 5ft cable for inside the tailgate.
https://www.amazon.com/YQMAJIM-Extension-Thicker-Dashcam-Reverse/dp/B0C6S2Q265/?tag=seriouexplor-20
I will use this inside the tailgate and use zip tie pads to secure it because I have these lying around. They are self-adhesive but I'm sure the tape won't adhere well to the inside of the tailgate so some super glue or epoxy should do the trick.
Again, this is so I can still remove the tailgate if the need arises. As for the hole in the bottom of the tailgate and going into the bed a 1/2" or 5/8" blanking grommets should do the trick to seal the tailgate and let the cable come through.
Looking at the connection for the mirror it needs a 10-pin connection. So today I'm on the hunt for the wiring diagram for the power mirror w/ heat and puddle lamps for an 02 Explorer. The mirror base to door is different so I'm going to look at how the mirror is connected to the base and hopefully be able to swap the bases.