Looking at the wiring diagram I would guess that the solar panel would be connected +ve pin 9, -ve pin 12, on block 5. The regulator is connected at block 6 with the +ve from the solar panel going from pin 9 block 5 to pin 2 block 6. This current is fed through the regulator and back through pin 3, block 6 through the 15A fuse and to the living area battery?
Please remember this is only my opinion and not based on any detailed knowledge of the charger.
Why not email schaudt and ask? I sent them an email asking for help on a sunday evening and got a reply for 8.30am the following morning.
BTW my instruction manual is for the EBL99G and is 26 pages long. Is that the same as yours?