Yeah keeping cables in can be an issue, and I don't know of any polished solutions.
I have occasionally used high quality adhesive hook and loop tape to affix USB hubs and hard drives to the backside of my laptop screen to help avoid similar issues.
I taped a few strips of the soft loops on the lid which I replace when they get dirty, and then hooks on the accessories.
So while it won't lock the cable in the USB slot, maybe it could help to use an industrial hub with either lockable, or high-retention USB ports affixed to the computer, and then only have a very short and soft cable to the laptop USB-C port?
I have occasionally used high quality adhesive hook and loop tape to affix USB hubs and hard drives to the backside of my laptop screen to help avoid similar issues.
I taped a few strips of the soft loops on the lid which I replace when they get dirty, and then hooks on the accessories.
So while it won't lock the cable in the USB slot, maybe it could help to use an industrial hub with either lockable, or high-retention USB ports affixed to the computer, and then only have a very short and soft cable to the laptop USB-C port?
Sample lockable ports hub: https://buy.advantech-bb.com/USB-Communications/USB-Hubs/mod...