Screw-secured Makita slide battery holder for Multiboard systems — mounts with a single large bolt through the Multiboard hole and locks the battery in place using the battery’s built-in latch; low-profile and robust for workshop use — large mounting bolts can also be 3D-printed from my collection (4 mm or 6 mm length): https://thangs.com/designer/187nitro/3d-model/Multiboard%20Big%20Hex%20Socket%20Screw%20%E2%80%93%20Countersunk%2C%20Many%20Sizes%20%20%28STL%2BSTEP%29-1420313