Belt connector for RigidBot, which uses a 6mm GT2 belt. This version twists the belt so the smooth side of the belt runs along the bearing. The 13mm version matches the height of the original part. You may need to mirror the part to have it oriented correctly.
Update: added an offset version for use with a 16 tooth GT2 pulley. The offset belt adds a little bit of torque to the extruder mount when the belt is tightened so I'm not sure it's good as a long term solution.
Warning: This part should be printed in ABS or another high temperature plastic if it is used near the extruder or heated bed.