I just got a retractable USB cable like this one:
https://www.amazon.com/gp/product/B00M4QAQI4/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I open my flap; *gently* retract the cable, plug in my phone.
At end of trip I rip out my phone, and *gently* let the cable go back in its holder and...