Need help wall-mounting a tablet

Hey all,

I'm looking to wallmount my Samsung Tab4 tablet but can't seem to find the right components to do it.

I already have an recessed plug for power (see image below) but cannot find anything small enough to plug in and power up my tablet.

I already figured out that I would need to purchase a slim flat micro usb cable to power up the tablet and I plan on 3d printing the wall mount. The only thing that I have not yet been able to find is a usb adapter that is small enough to fit in this recessed area. Anyone have any suggestions?