wow...you're confusing me and yourself I think.
ENGINE TEMP IS COOLANT TEMP as far as the car is concerned. The gauge on the dash is the little plug looking thing on the lower intake on the driver's side. The ECU's COOLANT/ENGINE TEMP SENDING UNIT is on the PASSENGER side screwed into the union for the BLACK METAL HEATER HOSES that, again, are on the lower intake. The connector for that is black clip on setup. I don't know how to explain it anyother way. As for the connectors for each of them...they should be right there near them. The harness only really routes one way.
see in this pic....where the chain runs across the distributor....follow the chain towards the bundle of plug wires...see the black HEX with a white plug coming off it? THAT is the sending unit for the ECU. See the black connector laying on the distributor? thats the CONNECTOR FOR IT.