Does it have the look of a factory connector? Usually, Green is a ground wire. I believe there are wiring diagrams posted somewhere here on the website. If not they are inexpensive from a lot of the Firebird aftermarket parts suppliers
86 Pontiac 2+2 69 Firebird Coupe(Under Construction) 69 Firebird 4 speed Vert Driveable but Under Construction 64 1/2 Mustang (Under Construction) 86 Z28 Convertible Weekend driver