yes, i do recall, very well, the two clips on each backing plate, but they were not removeable on my backing plates, AFAIK.
and BTW, notice the spring. the hook points up on one end and down on the other. and if the "up" end is not attached from underneath on the proper shoe (i.e. the front or rear shoe and unfortunately i don't remember which) the shoes cannot be fitted properly, if at all. and what's worse is that it may not be apparent until the e-brake levers are being fitted...or maybe i should say are FAILing, over and over and over again, to be fitted.
and don't forget that those e-brake levers are NOT symmetrical. there are two for the right side and two different ones, although only slightly different, for the left side. mine were stamped "LH" and "RH".