OData Service Activation - Required Services Missing

Hello SCN,

We want to implement the Shopping Cart Fiori apps in our SAP Gateway.

We have installed GBSRM001 and SRMNXP01 in our SAP SRM 7.03 system.

In the front-end serverI access /IWFND/MAINT_SERVICE and I select "Add service".

Then I enter the system alias of my SRM  system and I click "Get services".

I get a list of services, but the ones that I need are missing (e.g. /GBSRM/CARTAPPROVAL):

In the back-end server I access /IWFND/MAINT_SERVICE and I select "Add service".

Then I enter LOCAL as system alias and I click "Get services".

I get a list of services, including the ones that I'm looking for:

I understand the services exist in the back-end and that my user is authorised to see these services.

What am I missing to make these services visible in the front-end server?

Thanks in advance,

Jon