This is just a simple mount for cable management via cable ties.
Two 5mm or smaller cable-ties.
One 30mm x 30mm adhesive squares. I used 3M (likely a clone) VBH squares commonly found on AliExpress. I do recommend the 3M Adhesion Promoter 111 if being secured to unforgiving surfaces (e.g. glossy plastic).
Print as modeled, I used a 25% infill with 3 walls. I've also included the STEP and Fusion source files if you want to customize it.