need help quick!

hey guys, i just built my motor all up, got it slammed back in under the hood of my 94 teg and walked around to get in and realised i still can't find the wiring harness under the dash for the temp and fuel gauge to hook into the instrument cluster. I need to find the harness, its killing me because i don't dare start my freshly built motor without the temp gauge hooked up. What happened is I pulled the instrument cluster out about a month ago to install euro white face gauges in it and when i went back to stick the cluster in I couldn't find the harness, it vanished! I figured it must have fell back behind the dash someplace. I've looked for hours though. I only have two blue plugs to plug into the back as of this moment, so only the tach and spedo work. the car has been sitting now for about the last month or so, so i forgot about it until tonight. so if someone could tell me the following things...

A: is there a 3rd light blue data plug that plugs into the back of the cluster that runs the temp and fuel gauge?

B: if there is, is it indeed light blue like the rest of them.

C: any idea where it comes off the main harness?

if someone could tell me asap that would be so awesome!