Replace rubbers to stabilizer rear axle

Moin, I’m new here. I’ve been driving Opel for 30 years, currently an Omega 2.5 TDI BJ 95 and screw a lot of things myself. Now I need your help. The TÜV has written me a one-sided defect report. I could manage everything without using the FOH. So the FOH wanted to work alone for the fog lights, 100-200 EUR depending on the effort. I had a new front apron with foggers installed and the TÜV wanted it to work. I then got it for 5 EUR plus new switch at Ebay. Can at some point describe how to retrofit the cable. In the re-examination he additionally criticized a worn rubber on the stabilizer on the rear axle. Expansion and pushing out of the old part as well as pushing in the new rubber went with a hydraulic press without problems. I get the part in the built-in condition but not pushed far enough over the handle. As soon as the metal books with the iron cursssed, I lack any point of approach for a lever. Someone knows how to get the rubber over the handler. I have to expand the rear axle completely.