I bought a set of used radiator shrouds on here for my z400 but there is no hardware. I think the guy said they were OMF? Can anyone helps me out with pics or something regarding to where they mount up? It looks like the upper part can mount with the fender bracket and the other in a hole that's in a stock gusset. There are more holes at the bottom but the radiator wall is there.

Not positive but kevin, comaro1976, said that they go into the rad mounting holes too

The OMF`s top mounts (2 on each side...1 in each ear) mount to stock holes/mounts on the frame...just as you already suspected/figured out (NOTHING on them bolts to the 2 upper mounts for the radiator though!!!)...then there`s 2 holes along the rear edges of them that bolt to the stock black plastic shrouds & also 1 that bolts along the bottom edge of the stock shroud/louver (after ya drill the holes in the stock shroud/louver of course!).

Yup, got them on 2 days ago. Figured it all out with some drilling in the stock shrouds. The upper front tabs on the omf's didn't line up to the holes on the stock frame gusset some they bent pretty easy. On the 2 holes on the side that go into the shround and the one whole that goes into the lower shround I used extra stock body rivets. Looks really clean, rather than bolts. Thanks for everyones help.