USB outlet box

I needed to add USB outlets in a few spots in my travel trailer. I like this [dual outlet QC3.0](https://smile.amazon.com/gp/product/B07QXT4ZQ2) outlet due to very low standby current and no LED or voltmeter to suck power.

The box is designed for ventilation, although the outlet doesn't dissipate much heat (better safe than sorry). There are four screw holes for bolting it to a surface. The box size is 69mm x 47mm x 45mm.

Print is some heat tolerant material, such as ABS, so that it doesn't sag/melt in the summer heat while in storage.

Parameterized Fusion360 model included.