Loose connection in Central Electrical Panel

[Running on MT]

I have a '93 964 C2 that has had an intermittent HVAC problem. The main blower comes on or goes off when I hit bumps. I suspected a loose connection, but finally diagnosed the problem when I noticed that the remote side mirrors didn't work when the fan didn't work! The common point is fuse 26 providing power to the climate control unit and the mirrors. I've not yet taken the central electrical panel apart since I don't have very good information about its construction. Does anyone have an exploded view of the central electrical panel or some detailed pictures? Thanks.