Mount the resistor using M4 x 12 mm screws for the mechanical mounting holes and M4 x 6 mm screws for the electrical interface terminals, with a contact or spring washer for each screw. First mount the resistor mechanically using the M4 x 12 mm screws, tightening each screw by hand until the screw head touches the contact or spring washer. Then apply a nominal tightening torque of 1.8 ±0.2 N-m to fastened the mechanical mounting screws. Next, use the M4 x 6 mm screws and washers to connect to the electrical interface terminals by hand tightening until each screw head touches each washer, then apply 1.3 ± 0.2 N-m to fastened the screws.