Ok Im new to this forum but ive read a lot the last month & like everyone with a 87 Volvo 740 Turbo my Wiring harness is toast but the car is nice, so I understand most decide to plunk down $400+ for a new one or buy a used for $150+. Well I have a 88 Volvo parts car a 740 non turbo & I decided to use that harness & make modifications & make a quality overkill harness. I have everything done & it looks good even though I didnt follow factory routeing. the one thing that Im hung up on is the non turbo seems to have one Green wire going to all the injectors that branches off. now my turbo & another turbo I own have a drivers side fender mounted rectangle shaped white box that has 5 inputs one going to each injector & one from the main harness. Now my question is which wire goes to which injector? there are no numbers on the white box or the original harness. So Im wondering how you figure this out? sorry I dont know the name of the part im talking about. O yea all the wires are solid green

thanks for your time