Help...Adding Additional USB Port Behind Dash w/ OEM Radio

I could use all your opinions and advice. I apologize if this is a duplicate entry, however I couldn't search for the answer that I needed.

As the title states, I want to add an additional usb port or cable behind the dash so that I can run a usb cable behind and on top to my phone and radar detector mount behind or next to the rear view mirror. I'm wondering if there's a solution that'll allow me to do so. I guess my OCD is kicking in and I'm starting to get irritated by the dangling iPhone lightning cable whenever I need to charge my iPhone while my phone is mounted on top and using Waze or some other sh*t. I have an OEM head unit that I've installed an aftermarket sound system to and it's what I prefer as it's exactly what I want and need.

Thoughts???