For the smart guys:

Ready to put the engine back in, so I'm doing the final check. I assume one of my labels fell off this connector. It's under the throttle body in the coil region. My coils have been upgraded and moved.

Yellow wire / white stripe / red dot.

Any idea what it's for? Thanks!

Mystery wire / connector

 

99% sure that's the connector for the water temperature sensor (for the dashboard gauge, not the ECU input). There should be a metal tab near the rear of the engine, spark plug side, very near to the oil pressure sender.
https://www.rx7club.com/2nd-generati...cation-648805/
That's the water temp sensor, and the connector should slide right onto that metal tab. Wiring diagram indicates the wire color is yellow with white stripe.

 

That's it in the upper left corner of the picture:

 

That was it, thanks for the help!