How to replace the registration form in control panel?

Hi there,
How could I possibly replace the registration form in the B&W template control panel by the community builder registration forrm?
Where to go to retreive the existing link?
With thanks.
http://beautyontrial.co.uk/

Could you us what do you mean by 'control panel' ?

Could you us what do you mean by 'control panel' ?

Sorry. I meant the login control panel. You access it by clicking on the padlock icon.
We would like to replace the default K2 registration form by the CB one.