I think you need to modify and re-wire one of the wiper discs inside the wallbox, since the SC1 puts out a different pulse-train than the AY expects. It's not exactly a trivial problem, but not insurmountable (I've never done it, however...) I think you can find the instructions in the first Seeburg book of Dr. Know-it-all's collected columns from Always Jukin' magazine. It can be bought at
www.alwaysjukin.com
--Bob