The "click" in the V2 is a horn relay that applies the voltage (12/24) to one of the brushes when the motor on button is pressed. After the slight delay (20 milliseconds) the other brush is pulsed to ground at the pwm rate set by the foot pedal slide setting.

My hearing is in advanced stages of deterioration.

I was wondering if the Terrova worked in a similar manner as the V2 (relay, followed by pulses).