car info. 04 6speed

i just installed a used 13b. after i got it installed i realized the one white plug that goes under the ecu in the box has been cut off.it has 5 wires going to it. anyone know what they do/control? im aware that you have to have them lol.

i have the harness off the old engine but its gonna be a real pita to put on the engine since its in the car. how does every one feel about soldering them? then shrink wrapping them?

 

i would say enviornmental splice