You've got good eyes, most people don't notice the extra set of contacts.
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Spoiler alert: what follows is probably more than you wanted to know when you asked that question but I figured I'd post it all because if I just say it's for a tailgate power lock someone's bound to ask me how to do it.
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Back when I built the Safari Cab hardtop and barn door for the LJ, I installed a lock actuator in the tailgate so I could lock/unlock it from the driver's seat. I found this actuator at an electronics surplus place and installed it in the tailgate.
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The actuator was $6 at the surplus place but the can be found at Amazon in case anyone wants to do this project: https://www.amazon.com/P-P-RA-Actuator-Applications/dp/B07V9YGZJ4/?tag=wranglerorg-20
The lock actuator is thin enough to slip inside the tailgate (many aren't). The yellow dashed line shows where the body of the actuator is, some of it is out of the frame of this photo. The green circles show the screw heads that attach the actuator to the inside of the tailgate. The orange line shows the rod from the actuator to the lock rod (it's behind some of the latch mechanism so I drew it in for clarity).
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And rather than than have wires to power the actuator draped from the body to the tailgate, I added a second pair of tailgate contacts:
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I pulled a lock switch from some Ford vehicle at the u-pull junkyard and mounted it on the panel below the steering wheel. Also added the USB outlet below the switch, although I added that later, not part of the lock project - the outlet allows me to charge my phone in it's suction cup holder on the windshield with a very short wire - not a long wire draped all over the interior.
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I wanted an OEM-looking switch that would install nicely somewhere in the LJ's dash and the best one I could find in the u-pull was the Ford one in the photo above. It's a single-pole double-throw center-off momentary switch so to reverse polarity for the lock actuator relays were required.
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But if you can find a double-pole double-throw center-off momentary switch you like you can wire it like this:
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If you notice the date on the first wiring diagram I did this project back in 2010 so for the last 15 years I've been able to lock/unlock the tailgate from the driver's seat.
And I modified the Storegate shell to clear both sets of contacts on the tailgate.
My eyes were drawn to where you mentioned would need to be modified for the JK shell to fit. The second plastic contact cover was pretty obvious as were the two additions contacts on the tub side.
Nice work, as usual!
Definitely NOT too much information. I've added this to my ToDo list!! TY.
