This is a copper jumper strap normally used with the ground wires in the spa. These are mounted on the back of the pumps connecting the ground wire. Is part of the connections from the heater to the PC Board.
The Pump Pad is your key to a quieter running spa/hot tub. Mount your pump on the pad to prevent transmission of the noise and vibration from the motor in your pump. Works well with pumps on most models.