some wiring info
http://www.tehnomagazin.com/Auto-rad...-Connector.htm
not E34, but helps maybe
http://www.scribd.com/doc/27554788/B...ation-Feb-2010
on my E32 the amp is located inside the trunk under the parcel shelf, I have another E32 where the amp is installed here in the trunk behind the cover left side, and that is an Alpine amp
http://infinitier.ddo.jp/e32/page/ma...inte_50529.htm