[TG] 1994 autohelm manuals for my scarab

My newly acquired 1994 Scarab 34 Super Sport came with a Raymarine autohelm and GPS antenna installed. Wires on the antenna are cut and no clue if the unit still works, or how to rewire/troubleshoot.

Called Raymarine and was told that it's obsolete hardware that they do not support.

I don't even know where to look for the model number, or whether there's any manuals out there I could use to troubleshoot my system.

Any information would be appreciated.

Thanks