a PIA. I found a combination of below and above to work. Plenty of penetrant on hardware first. Might want to remove the battery in that area. Then short box end and/ or flex wrenches to break nuts/bolts loose,13mm heads IIRC. Why 13's I have no idea ? Once loose 1/4" sockets work well. If your patient your hands arms won't look like shredded taco meat. True labor of love, have fun.