I just received order 266507353 Electrolux after market motor for my Olympia model 1401. The motor/fan assembly is quite a bit shorter that the original equipment. There were no instructions or invoice or papers in the box. There is a 2" OD pvc pipe that is 2.6" long included, that has 1 rubber "flange" on 1 end of pipe. Does the rubber flange go on the motor side (rear) or the bag side (towards front)? What holds this adapter piece in place?