This is a bumper for the mouse so you don't accidentally hit a button while moving because you bump into something on your desk.
Unfortunately, the original screw must be replaced with a longer screw (M1.8 x 5 mm) for mounting securely. I collect such screws from broken electronic devices.
If you don't have a screw, you can use a USB-C connector to attach it. Simply cut from an old cable.
And if you don't have a old usb cable (really?), you can use the usb lid to mount the bumper, but this is not as stable as an original USB-C connector.
I recommend to print with ASA or PETG.
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