I've never encountered this before, but both of my rear caliper brackets are symmetrical and I've mixed them up. The only difference between the two is the slide pins in that one has a rubber bushing, the other does not. If you hold them together in the same orientation, one has the slide pin w/ rubber bushing on top, the other bottom. When installed in the vehicle, this puts the rubber bushing pins either top or bottom on both sides.
Some internet searching suggests that the pin w/ rubber bushing should go on the trailing side of the caliper mount. Is this correct? The trailing side would be bottom on this particular vehicle (caliper mounted toward the rear of the rear wheels).
Some internet searching suggests that the pin w/ rubber bushing should go on the trailing side of the caliper mount. Is this correct? The trailing side would be bottom on this particular vehicle (caliper mounted toward the rear of the rear wheels).