A simple holder for an HDMI bi-directional switch like this one.

https://www.amazon.com/Switch-Bi-Directional-Switcher-Splitter-Support/dp/B07B5XBC8M?pf_rd_r=47VM5R8KPSWKS3PEFJFD&pf_rd_p=aae46c9c-05b2-4487-a132-8266ab109a5d&pd_rd_r=5d3302a4-23fc-418b-9f0a-683adb15b432&pd_rd_w=5KNKN&pd_rd_wg=iGDEw&ref_=pd_gw_cr_simh

I made it to mount on my desk which is 15.5mm thick.

Print on the side with the small hole for the HDMI cable, for the cleanest print.