Hi Diego,
Use the following details:
Authentication Tab:
Fiori Client URL:
Note "Client HTTP Values to Send and & Send Client HTTP Values As" may not be required in your case. Try it without them, in case of issue add the values and try.
I would recommend to try with Standard Fiori Client first and then switch to Custom App.
It should work. In case your SMP Server certificates Internal CA Signed, install the RootCA and SMP Server certificates. This may not be required in all cases.
Regards,
Nagesh