Would love to see some detail on those push locks, not really sure how those work.
They are simple cheap drawer push locks, this was one of the great challenges of keeping the drawers closed while moving it around. And it was only when i mentioned my problem to a hardware salesman that he pointed out to me they had these locks i never used before.
When you close the drawer the locks hook the drawer, and to open the drawer again you have to give it a little inward push and the lock springs open.
Similar to the mechanism of a ballpoint pen!
Hopefully I won't get barred from the Festool group for mentioning the name DeWalt, but I built my workbench around my Dewalt storage units, which have built-in drawers, so no need for extra drawer slides and locks. In order to keep the drawer units from sliding out, I made the shelf so that it slides into the carcass. I'll attach a few photos to show what I'm talking about.
I will also add, don't use Home Depot plywood for this! Spent the extra cash on baltic birch. The bottom of mine has already come loose due to voids in the ply. I going to build a 2nd one a tad wider, and probably with shelves. I like the rolling carts from Rigid and DeWalt, and are far easier to carry individually, over leaving in the cart and moving as a unit--too heavy as well. The DeWalt one are the perfect size to me, and like the built in drawers.