Been wandering for the last couple of rear pad changes I’ve done wether the pad with the little nipple on the back is suppose to go piston side so I slots into on of the grooves on on the outside where is seems useless. I’ve seen many pictures and some have on the inside some have it on the outside? It makes sense to me to go on the inside as it fits in the piston groove but then don’t the pistons wind out the same way you wind them in when changing pads thus putting them in this way would stop them winding?