I would like to know how I can connect my Godin to my SC55 mkII?
If anyone can help me?

The main problem is that the SC55 mkII, being quite old, only has

It doesn't have a 13 pin MIDI connector, as my Godin has.

I do have the Roland GR-1, an old midi synth, that does have a 13 pin
MIDI connector, but:

a) I don't know how to connect the synths together to access the SC55 mkII
b) I'd rather access the SC55 mkII directly, if possible, so I wouldn't have to haul the
bulky GR-1 around to different places.

Any help in this regard would be appreciated!
My goal is to record some songs via the Sound Canvas onto the Sound Brush (a recording/playback device).