strange black plug

[dalecan]

So I'm still exploring and learning (trying to) the chim.
I found this black plug tucked up under the dash above the battery. It looks like a socket for a car charger but I wanted to ask her before trying that. Any ideas, am I correct?

Thanks all.

[dalecan]

Thanks all, I'll have a closer look and try and follow the wires / try a charger.