New to me '97 K1100LT.
I have the radio working after entering the code. Only one of four speakers works having adjusted both balance knobs. I'm trying to remove the radio to look at the connection or reseat to see if there's anything to help get the other speakers functional.
I can't seen to release the radio with the U-shaped tools. I slide them in until I hear a 'click', no luck. I continue to slide them down, no luck. I push as hard as I can and seat the tools to the very bottom, no luck. Any tips?

Have fun,
Jer