Handbrake unit ON/OFF type
2 wires required an Electrical board with On/Off button like FREX USB3B+1A to work.
Rally: Knob angle preset for attach on side of Steering Wheel and pull to operate.
GT: Knob angle preset for attach side of the seat.
Angle can be adjustable if you replace the internal M6 bolt of spring holder.
Maximul thickness of table clamp is 45mm