Hammond XB-5 Pedalboard 13-pin to MIDI

[portlandmike]

I recently inherited a Hammond XB-5 Organ, complete with pedalboard (XPK-25). To use the pedalboard on gigs with my Nord Electro, I was hoping to run the 13 pin pedalboard into a Roland GI-10 (to convert the signal to MIDI), but it seems to suck too much juice out of it, and the display turns off when I plug the 13 pin cable into it.

Is there any simple way to use the 13-pin pedalboard with midi, or a (relatively) easy way to convert the pedalboard to having a midi output?

Thank you.