how to connect SAP 4.7 with Web AS 6.3

We have installed 4.7 on one system and SAP web AS (6.3 beta - sneak -preview) on another system. How do we connect SAP 4.7 to WAS? When we try to execute a BSP application, in 4.7 , it is asking for password and user name of WAS server.

How should we do this configuration effectively?