yeah cant remember the order of assembly either, so guess i did not have prob with that,(aw...was is remove sensor from plug end, and feed plug through caliper,then insert pad, then clip in? Just dont clip the sensor into the pad until your sure you dont have to take the bloody thing out again) just agro getting the sensor OUT of the old pads with out breaking the sensor. Agreed, on assembly it just clips in, no bother.
The sensor has a tiny "circlip" on the stud and this does the clipping in bit, no way of compressing it when inserted to get it out. DO NOT PULL ON THE GRAY CERAMIC RIGHT ANGLE BIT, IT WILL BREAK. Rather push or tap the stud out from the back with a small punch or similar, about 3mil diameter i think.
Note, a distant memory of what i did. Not saying its the correct thing to do.
That said sensors are not massivly expensive, i just did not want to have assemble to go get new sensors and to
disassemble fit sensor and then assemble again. Hope helps.