E30 fusebox problem

One of the connectors that my wiper control module plugs into, in the fusebox, apparently came loose and was pushed through into the inside of the fuse box. Can anyone tell me how to get into the fusebox and reposition the connector from the under side so my wiper module can plug into it? I can't figure how to get inside the fusebox or how to disconnect the wires that go into the fusebox so I can remove it from the car.:screwy: