Gti 6 Into 1988 Dimma

[jaggers12 2]

im currently putting the gti6 engine into my dimma, i think i know where most of the wires got to. but im a bit unsure if i still need the ing ampifier to be connected, how to make the rev counter work and where to get the 12v ingition from. ive looked though the guide but my car only has the one brown plug.