Let’s be real — your T865's USB port braves dust storms, rain showers, rogue bugs, and the occasional splash of gas station coffee.
 
Although both connectors are waterproof, the cap adds extra protection for higher-pressure water ingress, in case of submersion or while washing your bike.
But over time and usage, this little rubber cover might not snap in as well as it should.
 
Simply replace it with a fresh one to protect the USB connector and headphone jack as best as possible.
 
Note: Use the Torx screwdriver included with your tablet to replace it.