What I meant was that the metal sleeve sometimes doesn't fit in the slot as previous fittings may have squashed the crossmember
So you should test fit that sleeve before anything else
Once you know that fits then it's grease the sleeve/bush before slitting them back into place
Outer bush on first then lever the TCA into place
The bolt goes front to back so that if the nut comes off the bolt won't fall out, but it's easier to put it in from the back as there more space