SAP WEB Dispatcher for Two systems

Hi experts,

i want to configuration  SAP web dispatcher for two hosts

web dispatcher has installed on saprate host( host are accessible via public ally) and other host contains two ABAP system are in same host.

i have configure two HTTP ports in the Web Dispatcher profile

icm/server_port_0 = PROT=HTTP, PORT=8888

icm/server_port_1 = PROT=HTTP, PORT=7777

In addition, you define the system assignments, as follows:

wdisp/system_0 = SID=ERP, MSHOST=ms_erp, MSPORT=8082, SRCSRV=*:8888

wdisp/system_1 = SID=CE1, MSHOST=ms_erp, MSPORT=8127, SRCSRV=*:7777

but i want to know how can do the url mapping i want to open WEBGUI for both ABAP systems.

and how can access?

Please suggest.

Regards,