I'd say dealership for the missing piece. The 07 - 11 battery lugs won't work on the newer JKs. Take your lugs off and look at both sides of them. It's a weird layered assembly that you would have to cut apart to use the 07 - 11 lugs. That's why the newer Qtech lugs just add addition spots for more accesories. It is very important that you do not place a wire under the lug tightening screw. ( closest to the battery terminal ) The bottom of the nut is cone shaped to seat into the lug properly.

 

Walmart sells some pretty nice battery terminals for $3.50. I just replaced mine.

 

I think I'll give the dealer a shot for the part I lost, hope it's not a ridiculous price.

 

maybe a junkyard?

 

I used a hose clamp on my 2016 JKU

I removed the terminal, slid the hose clamp on, used a 10 mm end wrench to tighten the nut on the terminal post, then tightened the hose clamp.

 

I have these. They work well.

 

I picked these up from Amazon when I redid the terminals on my dual battery system. They work well.

 

Used a hose clamp on both terminals and they seem to do the job perfectly. If I decide to get new terminals, like the one from quadratec, can I avoid cutting any cables to install by using the factory lugs?