1990 1g RPM Signal wire?

[Not7fifteen]

Installing my MAFT on my 90 Talon and I need to connect the white wire to a wire with RPM signal. I'd connect it to the CAS but mine has no plug or anything on it, wasnt sure if 90's not have one or if I have a 2g head or something?

Is there another wire I can tap into in the engine bay? Or do I have to tap directly into the CPU? If there's another wire in the engine bay or if it sounds like I'm an idiot and cannot find it please correct me or help me find a different wire.

 

[Not7fifteen]

Sorry, just took a closer look at the bottom of the CAS and it does have wires from it, just no plug. And the wires are complitely pulled tight and have no slack in them what so ever. Anyone know which color wire it is that the white wire from the translator taps into? If i can figure that out i can try to trace the wires back to somewhere where they are more accessible.
Thanks
Eric