I realize this is a few months late, but it appears that the 2 bolts that secure the rear disc brake cylinder mounting (*2) to the caliper is 110Nm, 1122 kgf/cm or 81 ft/lb torque.
The bolts for the rear disc brake cylinder assembly (*4) looks like is 35Nm, 357 kgf/cm or 26 ft/lb torque.