Which way up?

I admit to being a slow learner.

After years of wrestling with USB connections as I try to insert them right way up into their slots on my devices I have finally learnt how to do it first time.

Bottom  of one of my USB connectors

I didn't know that the bottom of the connector has a seam while the top is smooth. EASY?

The number of expletives I utter is now bound to drop.