Mikki you are a star! Thanks for your help.
Ouch! that's not good, so I am missing a bolt from somewhere on top of the bellhousing, and another one down at the bottom.
Looks like these numpties removed the gearbox to install the new rack.
Is it ok to put the M12 bolt back in myself, or do all the gearbox bolts need to be tightened tightened together in a sequence?
I'll probably replace the bottom one too, I don't like missing bolts