How to Configure 464Xlat in router / Wan page settings

Hi, i have turned on the FLAG CONFIG_PACKAGE_464xlat=y, and build a custom image , for my router.

now, i wanted to test the DUT. i am not sure of the topology and the wan page configuration. can anyone suggest me a topology for testing the router with 464XLAT. i have a working ipv6 internet connection too.

<INTERNET(WAN)>---ipv6---- [OLT] ---ipv6---<DUT(router)>-----ipv4----[lan pc]

is my testing topology correct ?or

do i need a plat server also

and what will be wan configuration for testing the xlat

Not sure what the DUT is, but please show the output of ubus call system board