Help - make VPN SSL accessible from another WAN

Hi there,

need help please.

we using FG60D with firmware 5.6.2 we've setup VPNSSL with listening from WAN2.

vpn ssl can be accessed from outside network (network with no connection to fortigate).

vpnssl created for connect LAN (using interface port 1).

how to make vpn ssl also accessible from WAN1.

user connect internet from WAN1, but when needed, user can access vpnssl to connect LAN.

special note:

generally, user who connect internet, don't have access LAN, that's why we don't create policy between WAN1 and LAN (Poirt 1)

need help please