Connection Bose Radio

Hello, everybody.

I hope someone can help me...

I'm building a Navi Plus.
The navigator itself is going so far.

But I can't quite handle the connection of the Bose system.

On meem old Bose Casseten Radio I have the following connections at the rear.

Red 10 pole plug:

LR Line Out
LF Line Out
RR Line Out
RF Line Out
RC
COM
(free)
ENA
CL
DATA

Black 8 pole plug

Minus
Total
(Switched plus with nem A)?
Light
(free)
(Switched plus) ?
Once again mass
Gala

Most of it is quite self-defense.

I'd like to know the following:
What's this?

RC?
CL? possibly clock?
Switched plus with nem A? Is the switching plus output? The Navi Plus doesn't have that in shape..

Anybody know anything?

greetings
Sven