An interface between the gunwale or other surface of a boat and a tool such as a electronic device such as a fish finder. The interface is tucked under the mount of the electronic device and includes an opening running radially from the interior of the interface to and beyond an outer diametrical portion of the mount such that a power cord and/or other electrical connections can run from a power source in an inner portion of the boat, then to a central portion of the interface, then to the portion of the interface disposed beyond the outer diametrical portion of the mount, and then to the electrical device.