Replacing top mounts on my mk 3 golf gti abf 1996 got the koni sport strut off,,,and there is a nut that holds the bearing on that i cant get it to shift any ideas

the old top mount looks different to my new ones and it has Spain on it,,, the ones i bought are VW GOLF/VENTO MK3 2.0LGTI, 2.016V & VR6 1992/1998,,THEY ARE MADE BY FEBI BILSTEIN GERMANY,,,, the old top mount came away with the nut that holds the bearing in place

is this ok or will i need to get the nut off,, anyway put strut back on car with old top mount as need car for work,,,,please help
