Free sockets in the trunk?!!

Friends, today I saw 3 idle sockets (I couldn't take a photo of one) on the spare wheel. The reason I didn't notice it before is that the sockets are tucked somewhere in between so they're not visible. I don't know what it is. After all, there is no part of the vehicle that does not work. What are these sockets?

These are factory-fitted sockets for additional equipment.

Bless you, my friend. I was surprised too when I first saw it. I thought there was an empty socket somewhere and it wasn't plugged in. Thanks.

Socket etc. can come out from everywhere. infrastructure is ready but they put it in all packages which are standard for option.