I debated this as well when I added an Android Auto head unit into my Element last month:

1. The existing USB jack is very inconvenient to plug/unplug, unless a cable is ran somewhere more accessible, at which point aesthetic value suffers (who wants a cord dragged across half the dash/console)

2. The small tray on the right at first seemed ideal, but there's nowhere to place the phone itself, unless you get a holder of some type, but there was nothing I could find that wouldn't interfere with operation of the vehicle (either too close to the wheel, or low enough to hit with my leg while driving). Mounting the phone higher again means a USB cable being run across the dash/console in some manner, and with Android Auto you don't need to look at the phone anyways.

3. Still inconvenient to plug in, and has USB cords running all over

4. This is the solution I settled on: You can drop a USB extension down through the front center console (straight down behind the dash where the radio is mounted), run it underneath the floor mat to the center console area. Then I added a USB plug and magnetic cellphone holder to the front of the center console. Mind the placement to ensure you don't obstruct the parking brake operation, nor the drink holder.

I used: https://www.amazon.com/gp/product/B014RWATK2/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 https://www.amazon.com/gp/product/B012PSPRR0/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 https://www.amazon.com/gp/product/B07BS4S89H/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Now when I get in, I plug my phone into a short ~6-inch USB cable, and then let the magnetic holder hang onto it while driving. Easily reachable, simple to unplug/take with me, and the radio is all android auto so I have no need to look at the phone while it's docked/charging.