Custom Connector Authentication with Url as a parameter

Hi I am developing a custom connector for rest API,

The API need the token , but  we need not have authentication , token would be genrated with client credentials.

i found a way to pass the credentials  to the code using

ApsOdata = [
Authentication = [
UsernamePassword=[]
],
Label = Extension.LoadString("ApsOdata")

];

But i need a third parameter Url also which needs to be stored .

Any help here would be appreciated .