The RAM® Cable Manager for Large Electronic Mounts (RAP-402U) creates a clean, protected pathway for electrical wiring, allowig you to mount a device over a new or existing hole used for cable routing. Designed to provide a tidy entry and exit point for cables while concealing installation openings, this plate is compatible with all 2.25" diameter ball bases featuring a three-hole, 120° hole pattern. (Note: it is not compatible with AMPS hole patterns.) Its durable composite construction acts as a buffer between the boat’s surface and the mount’s base, helping minimize vibration and reducing potential fiberglass or gel-coat damage.