Take a look at this video to fit your USBc connector on the Tripltek Motorcycle mount
Use a double side tape to secure the USBc cable on the mount socket
It is also recommended to use the O rings you can see on the picture below to make sure when the vehicle is powered the water does not touch the USBc connector to prevent short-circuiting
The O ring size is 9 mm x 2 mm or 13/64″ x 5/64″
https://www.tripltek.com/product-page/tripltek-motorcycle-mount-for-t9