Why does this register link point to this page?

Here's a puzzle for those interested ...

I'm not sure what's generating the login / register links in the admin menu, which appears when a user is not logged in.

The login link points to the standard login screen, which is cool, but the register link points to a page I don't want it to link to anymore ( open a store ).

Not sure how to adjust this to point to another page ... ideas?