Allows for the mounting of any common ebike battery tray (reention, hailong, polly, etc) to the folding tube while still retaining the ability to fold up the bike.

Print 3 copies, use M5x45mm screws and M5 heat inserts (4 per clamp, 3 for attaching bolts and one for the battery tray). Print in something that will handle outdoor exposure and with lots of perimeters and high infill.

(Note: the second photo was a test fit with the only long M5's I had on hand @ 50mm which was too much, 40mm does work, but I think 45 would be best. YMMV)