Problems with retrofitting eFH 80 B4

Hello, need help. I bought a set of original eFH, are from an Audi 80 Avant. I myself have an Audi 80 B4 Bj 92. I have built everything in. Prob 1 the support (screw) of the FH motors are not suitable for the door panels. 2. Prob the cables/plugs from the wire harness are available, but under the steering wheel I don’t find the counter plugs. The control unit was also included. What should I do? Stand here now with down-leased pants, a window and it could rain right away ^^ What should I do? or does anyone know what I’m missing?