SAP webservice use specific SSL Certificate

Hi Guys,

I have a newly created web service that works internally in SAP:

Then I made a new entry in transaction STRUST with my certificate:

I have found my web service in soamanager and I have generated my WSDL to acces it from soap ui

Unfortunately, I cannot seem to access this web service from soap ui and if I look into the SSL Info, it seems to be using another SSL Certificate (another existing certificate from SSL Server Standard in STRUST). How could I force the consumer to use my certificate instead of another one?

Thank you in advance for your answers!