Trying to add pre-out/main in CA-410 Yamaha

Hello all,

This is my first post on diyAudio. The national forums did not give enough info. Well they did, but not regarding my question. I've managed to replace the PSU capacitors & repairing the Watt meter lights using led's. The pics:
https://plus.google.com/u/0/photos/1...77410188427537

I've studied the schematics a dozen of times. I understand after 4 months of studying (back to physics!:t_ache:) the basics again. About transistors/caps/polarisation etc.) So far for the intro.

I've read this topic on diyAudio:
http://www.diyaudio.com/forums/solid...ing-right.html

I've seen pics of the CA-810 in the internet, rear panel, so I gues it can't be that hard. The plan is to add a Rotel "endstufe" to the Yamaha. ;):
http://www.uni-hifi.de/cms/upload/bi..._06/RB06_1.jpg

So the question is: Can anyone give me some hints? (best way to learn)

Thnx in advance,

Chris