That's a pretty clean install (both yours and the link's). I don't see why you couldn't mount a 2m antenna the same way. A lot will probably depend on the type of antenna mount you use. My antennas use an NMO mount, so the base tends to be wider (but fairly short). It might still work if the base of your antenna is short and can fit between the metal tab and plastic cowling. Then, the antenna will just stick up through the hole. You could even get a folding 5/8 wave so you can drop the antenna down for garages, etc. My only concern would be the counterpoise for the antenna, but that may or may not cause you to lose sleep.
John (brussum), KL3JC
2008 Toyota Land Cruiser, BajaRack, IBS dual battery system, Yaesu FT-8900
IRLP node 7036, Alexandria