CB Radio Mount under dash?

Hi guys,
I would like to know what this mount located at the lower end of the dash at passenger side might be? I assume it is a mount for a CB radio but this is just a guess. I hope someone knows for sure. It is wired to the harness under the dash and definitely not from factory. It is deisgned in two parts. One is mounted to the dash, the second is inserted and also closes some contactors with the part mounted to the dash.
Sry for the bad explanation but english is not my first language.

Thanks in advance!
Best
Christian

View attachment 1715713034 View attachment 1715713035
That is slide mount anti theft bracket from back in the day so you could take your stereo out of your vehicle so it wouldn’t be stolen. Pull out on the bottom part and you will see how it works.