How do you swap out the "tool clamp" (13) from the "Locking Ring Nut (12)

Hi all,

Slowly making progress towards making my first cut. Emphasis on slowly haha.

This morning’s problem is that I have yet to install the bit into the motor, and when I have tried, I’ve noticed that the Tool Clamp is for the 1/4" bit, but they sent me the 6mm bit, so I need to put the 6mm Tool Clamp in.

However, for the life of me, I don’t see an obvious way to remove the existing Tool Clamp from the Locking Ring Nut.

Help me Obi Wan Kenobi, you’re my only hope.