RST_NEV

Firstly hi all, im new on here and just purchased a 1990 S2 RST Escort. it is totally standard apart from the Radio. I have been given the 2007 Model radio that was standard it the car, and the car also has the optional Graphic equaliser in it. I have no idea how it is wired as the existing wiring has been cut/altered, and i cannot see at all what powers the graphic, but i do have a din lead that goes from the radio to the graphic but believe this only does the sound output/input. Had anyone got any diagrams that show what wires go to what pins on the radio/graphic, or any other wiring diagrams / help.

Many thanks in advance. Cheers Nev