well im done dropping in my engine. but I have these two plugs left over. One is a round two plug connector and the other is a 4 plug connector but olny 3 wires. and its not the sensor up front under the tb. I have that one plugged in.

 

The two prong connector looks like it for a egr solinoid but I could be wrong. The egr solinoid is on the pass side of engine. The four prong looks like a iac connector but these are not it since your pics are at the master cylinder. Might be connectors that are not being used for options that you dont have. My car is an 89 and not an 87 so there might be different connectors for each year.

 

i think the 4 prong one is for the tranny. ill check out the egr solinoid .

-thanxs

Jose