If you want to create an administration profit center you just have to choose the type "article management", to add all payment methods and possibly all articles.
It will be necessary to add a staff tag with the role admin on this one in order to have access to all the functionalities.
Info
An admin point allows you to manage disputes, top-up / refund Cashless tags as administrator, etc.
It is often on this profit center only that the offered credits are available.