James U Mchenry , IL November 03, 2020 Appliance: Frigidaire Microwave, Over-The-Range FFMV1645TWA Frigidaire Microwave Ffmv1645twa: Bought used no wall mounting plate. How to replace Microwave Rear Wall Mounting Bracket. Purchased wall plate from Appliance Parts Pros. 4 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes