1985 Riviera t-type 86-87 Ecm conversion info

[beeturbo]

Hi guys i have an 85 Riviera thats giving me the blues .. ive gotten an 86 buick 3.8 SFI Ecm, got an 86-87 C31 Module and coil pack wit the 3 individual coils and 86-86 maf meter .. my question is that wheni unplugged the 85 ecm it had 2 harness plugs and a separate 12v plug in pig tail , but the 86-87 ecm only has the 2 harness plugs and no pigtail.. imlost is there a way to make this work or do i have to replace the whole engine to ecm wire harness too. This is my first hot air car so all info is appreciated.. i also just acquired some 36lb blue top injectors and a 93 octane chip calibrated for the 36lb injectors both from an intercooled car so i put that chip into my 86ecm