Tach was wired inline, so if you don't have a tach, you should have a red wire with white tracer with a ramdom plug in the middle of it. If equipped with tach, one end of plug went into the tach, and a wire coming out of the tach went into the other plug.
Clock wire plugged into the fuse box. There were lights on both gauges, but not sure how they hooked up.
Can you take pics of the connectors?
85 CJ7 258, borla header, Team Rush, MC2100 ,optima batt, Warn 8274, agr super box 2 & pump, T5 w/ B&M shifter, centerforce 2, superior 1 piece axles, warn hubs 2.5 in lift, 31" BFG MT
85 CJ7 258, A/C, T176, MC2100, Team Rush, Warn XD8000i, superwinch hubs, 3in lift 31" BFG AT/KO