Hackers Help: Wall Mounting IKEA STÄLL Shoe Cabinet?

I’ve seen many Pinterest pics with the IKEA STÄLL shoe cabinet floating.

IKEA STALL Shoe Cabinet

When I look at the IKEA STÄLL shoe cabinet assembly instructions, there’s only one flat piece that runs across the back of the cabinet.

Its idea is for you to use it to fasten against the wall and the weight rests on the front legs. If I don’t want the front legs, what’s the best way to secure the cabinet against the wall?

IKEA STALL Shoe Cabinet

Would the cross beam be enough to support the full weight of the STÄLL shoe cabinet (46lbs) with proper wall anchors? I would like to wall mount three of these cabinets in a row.

One idea would be to run a cross beam underneath the cabinet to support the weight from the bottom in place of the legs. Would that be necessary? Love to hear your thoughts Hackers!