The bracket will fit in the cubby without cutting. You will need about a ¾” diameter hole for the coax (drilled right behind the PL259 connector on the radio is best) then another smaller ½” hole for the power leads to fit through (because of the terminal are so big). An additional hole for the headset wires and PTT usually near the back of the intercom. If you want to cut the whole thing out you can I have just always drilled holes to keep the box some what contained. Do not run the power wire through the same hole as the coax, keep them separated. We recommend installing a grommets (or use wire loom) where wires pass through or at a minimum wrap the wires in some additional insulation like electrical tape. If you watch our other install examples you will have a good idea how to install TheCOM. If you have any questions please contact us. We will strive to get a video up soon.