What are these electrical connectors?

[slowestmonte]

I have these two electrical connectors unplugged in my engine bay, along with one down below that I couldn't get a picture of. The two up top are right in front of the carb, and the one underneath is hanging down next to the oil filter and looks kinda similar to the green one in the picture, except it's tan. Does anyone know what any of these are for? The car is an 88 305 Monte Carlo.

 

[Ribbedroof]

Green one is a diagnostic lead, does not connect to anything normally.

Tan wire down low might be the brake proportioning balance warning lamp lead...depends on what shape the terminal is.

No idea on the red one.