Unfortunately, the holes in the cradle don't even come close to matching the holes on the bracket. That's sort of what is frustrating since I bought this specific bracket (ABWMK-HD-100) at the recommendation of an Anton-Bauer rep. Unless there is a different/better bracket I'll have to resort to the Velcro approach or drill different holes in the bracket.

I was just holding out hope that the "store bought" solution that was recommended would actually work.

This probably doesn't help, but IDX has a good wireless mount. (costs 3x what your does) I'll look at it when I'm home and see how it mounts. It MIGHT fit a AB back end, but I tend to doubt it. Now the mount you bought, looks like it would work. Put FE-DTE-100 in cradel, remove bolt from back of DTE cradel, put through mount, screw into cradel, done. It should fit one of the holes.

I know this post is from awhile ago, but what about this:
Anton Bauer HDMPA Hard Disk Recorder Mounting Plate HDMPA - B&H

Can a magic arm be used to mount the DR HD100? If so what suggestions please?