My first post and I believe I can help on this one.
I found what you are looking for on Crutchfield. I recently installed the Kenwood DNX 7120 in my 2000 camry and I came across the wiring diagrams for the AMP for the 2000 Camry. I also think it was wierd that documentation says that because my car has factory tweeters it has an amp. I couldn't find an amp. It has two amps now though
Enough of my babbling they have the wiring for the 1993 Camry amp.
http://crutchfield.custhelp.com/cgi-...i=&p_topview=1
If the URL doesn't work, go to Crutchfield, then go to support, type in Camry for the online support center and the documents will come up.