Best way to attach a power bar to badly painted brick/concrete wall?

I'm a renter in a very old apartment building, I don't mind drilling or screwing things into the walls as long as i can patch and hide it when i move out, but every tapcon style screw I've found doesnt fit the keyhole style openings on the back of any of my power bars

Ive also tried various adhesive style mounts, velcro ones, command strips, double sided tape, etc, but the point of failure is always that the paint rips out and it falls, and i end up patching the paint with a color matched sample.

Does anyone have a suggestion that isnt too much of an eyesore?