Mercury - Remote Control Spacer Plate Side-Mount Control Accessory 17063T. Overview. Sometimes the smallest piece of rigging hardware makes the biggest difference in how clean and comfortable the helm feels. This spacer plate gives a side-mount control just a little more breathing room, which can make throttle and shift movements feel more natural. It is a simple, sturdy plate that boaters often use when their console or mounting surface needs a touch of extra clearance. The end result is a setu