Box connection

Hello I have a question and indeed a friend has an Audi 80 b3 type 89. Now the question is he has connections at the rear of the hat rack for LS? I haven’t seen the car yet. Should new radio and the LS be installed. Yes also woman can! *g* Would be nice if anyone can help me. and then she also has a gamma radio in it, wants to exchange it for a Sony only unfortunately it is so that the iso plugs do not fit. Does anyone have any idea what the plug should look like? lg jenny