Power Supply Bracket for Tone Trunk Pedalboards. You can install the bracket in a different horizontal position on your board. The boards have pre-drilled holes for this purpose. The available positions vary with the board models. The enclosed, self-adhesive rubber matte should be attached to the bracket if the height of your power supply is less than 34 mm / 1.34 in Designed for T-Rex FuelTank Junior/Classic/Chameleon and Pedal Power 2 plus.