On that particular model, the tubular rivets should be on the nozzle. The easiest way to install those bumpers is to heat them under water to make the plastic soft and pliable. Then, insert a thin flat blade screwdriver through the hole in the bumper. Then butt the screwdriver blade underneath the rivet while sliding the bumper down the screwdriver itself and finally onto the rivet. Repeat that procedure for the other side, then stretch the bumper all the way onto the nozzle. I've also heated those bumpers up in the microwave for a few seconds. If those tubular rivets are missing, you'll need to install the bumper with pop-rivets and a special pop-rivet gun. I would suggest you get the bumper brackets that are made for the 500 series bumpers. They won't be quite large enough, but they will help stabilize the bumper. To do that, insert the rivet into the gun. Then, insert the other end of the rivet through the bracket, then the bumper, then through the nozzle, and finally through a washer on the inside of the nozzle. Squeeze the handle on the gun a couple of times and the rivet will flatten out on the washer. The gun will usually also break off the piece of the rivet in the gun. Also, I think the "finger" on the belt lifter may need to be moved 180 degrees. It's been a while since I've done one of those, so I'm not positive about that.
