I'm wanting to install a few LED lights in my amp. I've got a 6505+ and I need someone to point me in the right direction please! Thanks.
All the LEDs you will install need a current limiting resistor in wired in series.

The schematics available from a quick google search show theres a low voltage transformer in the amp that provides power for the channel switching circuitry. Locate it in the amp and steal power from that.
You wouldn't happen to have a schematic would you? Everyone I find is to blurry to see anything at all
The schematic doesn't really help, you still have to identify it on the board. Easiest way is to find the power LED and see what its hooked up to.
wire up leds with 9v batteries, thats what i did just bc im too lazy to figure out how to wire it into the amps power