I leave an image, property of ´´the corner of the tv solutions´´ ..of Gustavo Herrera Dublain ...
And a lin where he performs the recovery of a Magnetron ...
Although for the moment, I have not encountered a problem like the one you are pointing out, I would try to join them with a mechanical clamp, without forcing too much and trying to avoid damage to the insulation of the coils and inserting the, say, ferrite core.
Regards
Sorry!
I can not upload image .. I leave link to it ..
https://www.google.com.mx/imgres?imgurl=http%3A%2F%2F1.bp.blogspot.com%2F-sygyxai908o%2FU0ma1MUmIlI%2FAAAAAAAACcs%2FnbnYpEYNs0w%2Fs1600%2F%2500%2F%2500%2F%2500%2F 2Bla% 2 Covered% 2B superior% 2By% 2Belements% 2Bassociated% 2Ben% 2Bun% 2BMagnetr% 25C3% 25B3n..jpg & imgrefurl = http% 3A% 2F% 2Felrincondesolucionestv.blogspot.com% 2F2014-2m0-3m0-type 0fm-3m0m-3m0m-type 0fm-3m0m-2md-0md-man-type 0fm-3m0m-2md-man type -por.html & docid = iLHekxfHPAB85M & tbnid = yMMIstw7h02aBM% 3A & vet = 10ahUKEwjUpIqilOvcAhUGRa0KHYBbCMwQMwg_KAYwBg..i & w = 640 h = 480 & & bih = 635 & biw = 1350 & q = repair% 20magnetron & ved = 0ahUKEwjUpIqilOvcAhUGRa0KHYBbCMwQMwg_KAYwBg & iact = mrc & uact = 8
http://elrincondesolucionestv.blogspot.com/2014/03/magnetron-tipo-0m75s-31-fabricado-por.html