This a USB/PTFE tube support, when using the A1-Mini without the AMS, the USB control cable and PTFE tube flop around near the build plate and behind Z axis support and rail. A while back I had read that someone had the USB cable torn out of the printhead while the printer was in action. I created this little marvel of a model to possibly do away with that ever happening to my own printer. Very simple print that snaps together. Please see photos on how it goes together. Model was printed with Bambu Lab PLA, a generic filament may need plus or minus sizing, this print profile fits perfectly in place, no supports, prints in approx 26 minutes. Thanks for looking and share a like if this model solves the dangling USB cable for you.