The LH strut tower ground connector plug (below trailing coil) and the wires leading to it are completely gone. Missing. Only thing there is the copper prong block. Think this is causing in-dash circuits to be buggy. I’m thinking possible solutions could be:
1. 86-88 turbo harness, with turbo plugs “capped”?
2. Cut into current harness and try to find the missing ground wires?
3. refurbish an eBay 86 n/a harness (atkins,mazdatrix, and every other shop on the planet doesn’t have 86 n/a harness)

4. Your idea here!

 

#2 is the easiest way, that harness does the whole front of the car (minus the engine), so its a ton of work to change it.