Looking the procedure up on the web, every article started by saying remove the wheel. Obviously authors had not dealt with a rear hub motor deraileur etc.
I changed mine by undoing two hex head screws, noting where a spacer was located, removing the worn pads with long nose pliers, cleaning the mechanism and repacing the new pads. Hold the assembly in place on the disc, replace the spacer and tighten the two screws, job done.
I changed mine by undoing two hex head screws, noting where a spacer was located, removing the worn pads with long nose pliers, cleaning the mechanism and repacing the new pads. Hold the assembly in place on the disc, replace the spacer and tighten the two screws, job done.