MA7008O

My 1991 964 cabrio come along a Blaupunkt Berlin IQR 88 which has the amp under the passenger seat that I would like to keep specially due to the looks, but there are a couple of questions I would like to know and solve first:

- It seems as is the head itself does not have a built in amp, and that it outputs the signal for the amp with one of the connectors on the back, but which one and with what cables? I would like to upgrade the external amp with an after market one.

- Further, I would like to connect an Ipod or something similar, and since it has a CD input, there has to be the auxiliary connections on the connector, but which are them? I need to identify the 3-4 cables on the CD input and that one that activates the CD signal.

There are four round connectors on the back:
- CD input with 8 pins.
- AF jack with 8 pins (what is it for?).
- Remote control jack with 7 pins (what is it for?).
- Connector for data bus (what is it for?).

There is no information on the users manual, and any input, wiring diagrams or what ever help would be very much appreciated.

Thanks in advance.