I have an update on this little project. Back in July, the above discussion took place.
I had some custom steel brackets fabricated. These brackets will "back up" the cabinet facing. They are painted black steel. Then bolt down through the floor with carriage bolts 1/4-20, with fender washers and nylock nuts on the underside. The brackets are like:
user War Eagle found these popup, chrome plated, truck stake pocket, tiedowns. Thanks, I think these are perfect for my use. These mount through the above bracket:
I have received contruction photos from ETI showing the result:
The result is sturdy anchor points, down low, over the axle area. Chrome plated, sleek and "popup" so when not deployed, they will be out of the way, probably hardly noticeable once the cabinet doors are on.
But when popped out for use, they will be sturdy, and not rip the cabinets out as their anchor mechanics is down through the floor.
I have not seen this in person, only my progress photo from ETI. But I like how it appears to have turned out.