Remixed this to mount a USB and Aux port from my GROM BT3 with the USB and Aux addon kit. This should work with any USB and 3.5mm Aux addon kit.
I couldn't find a USB/AUX switch for a 2005 Nissan Frontier, but I found a ton for Toyota. So I bought this Thing from Amazon:
It has a single mounting screw and can be remounted into this remix. I did notice that the cable on the back of the item I bought from amazon does come off easily you could use some hot glue to glue it in place or I used some Kapton tape. Unfortunately that is how the Toyota piece came and there isn't much I can do about that.
Amazon Basics PETG
Make sure you use PETG for all automotive stuff as PLA will warp.