Have always used it. I have the short black android mini usb cable fitted.
Closing the left arm with it fitted after phone removal, guides the mini usb lead into the purposely placed slot in the base of the RC. This allows the arm to close fully. It then allows for you to remove other RC end of the cable to recharge, in the knowledge that if you open the arm, said cable wont fall out and get lost. I then leave RC end of cable ajar until next use. Open arm and connect S7e phone to correctly pre-positioned cable. Then plug ajar RC end to Launch DJIGo4 android by USB association. Works well for me.