switch shops

I have two fashion online shop websites. I want to switch which website shop is linked to my facebook business pages.

I want this facebook account

https://www.facebook.com/LouisKleinFashion/

to link to my squar espace website https://louisklein.io/

and I want this facebook account

https://www.facebook.com/davidlouiskleinfashion/

to link to my shopify website

https://www.wildbeautifulclothing.com/