LEGO model of USB socket?
At a larger scale, a similar hole that includes an indent that can accept circular connectors, preferably 3-brick long for anchoring, for a true connection. But at that size, it would be roughly 3.2 times the size of a typical laptop.

For a tiny model, just do a 2 x 1/3 x 1 brick hole, into which a no-studs plate can be slipped.

If you are going for an actual socket that can hold a stick, sorry, but the end of the road is here, barring rubber piece use. A standard A or B type USB can't fit into LEGO proportioned holes.