Tested the TJ gauge cluster finally!
https://www.youtube.com/watch?v=xpO4isRTThs
However I thought the KJ plugs were the style I needed but it turned out they have more pins than the TJ, so I need to find the same connector type but with fewer pins to fit the TJ cluster.
Grrr, back to the junkyards to raid 15 year old Chryslers.