Abstract: A mounting assembly for removably mounting a device, such as a trailer light, upon a cleat-like fixture. The light or device being mounted is attached to a base which has an aperture formed therein and configured to correspond to and accept at least one prong of the supporting cleat. An elastic retainer, such as shock cord, is stretchably fitted over the other prong of the cleat. Further, in the event the cleat has a hollow center, a modification of the base of the device isl configured to fit over the cleat and has a pin which passes through the hollow portion to affix the device to the cleat.