10 mm HEX adapter for TT gear motor. M3x5,7 mm threaded insert needs to be installed in the end. M3 bolt / set screw is used to secure the adapter to the motor shaft. See attached video for installation.

Two different wheel models here: https://www.thingiverse.com/thing:6307844

Creality

Ender-3 v2

No

No

If using Cura, set the z-seam to "shortest" so it will always be in the groove and doesn't interfere/require sanding to make the wheels fit well.