The link to MotorGuide Removable Mounting Plate, Black has been copied
Made out of a high-impact composite, these mounting plates make removing your trolling motor and mount fast and simple. The universal hole-patterns fit most traditional trolling motor mounts and all traditional MotorGuide trolling motor mounts. Fits Gator Flex 360, Gator 20.5, 20.8, 21, and 21R mounts and can be modified by adding additional holes to fit the longer 23.5 and 24 mounts. The smaller insert piece is secured to the boat with stainless steel bolts, washers, and nylon lock nuts. The larger outside piece slides into place from the front of the boat and is held in place by a stainless steel pin that runs through both pieces at the back of the mount.