I know that a question like this exists, but the answer is not what I was looking for.
Do vga/dvi have screws because they are not hotpluggable? Why would they not be hotpluggable (surge issues?) Also, would a kvm be dangerous for a computer/monitor since they are not hotpluggable?
They're just there to stop them falling out of the sockets.
A lot of the older D-type connector like serial, parallel and SCSI ports have them.
The cable coming out is relatively heavy and is easy to knock out, hence the screws.