Simulate a specific CURL using HTTP caller in FME Desktop

Question

I am trying to simulate the following CURl using HTTP caller in FME Desktop:

$ curl -X POST --noproxy “*” -k "https://server_name/connect/token" -H "Content-Type: application/x-www-form-urlencoded" -d "username=asdfg" -d "password=ghjkl" -d "scopes=openui profile".

Where can I specify the body parameters in the HTTP caller transformation?

Thanks

I have used the authentication option to fill in the username and password.