SSL VPN fortigate with juniper

Hello Guys,

I have an infrastructure with juniper (gateway) and fortigate (firewall). I need to implement SSL-VPN on the fortigate. Fortigate has private IP (172.16.x.x) and the Juniper Router is the gateway. Do you have a idea how make settings on the juniper to forward traffic from 10443 port to the listen port between juniper and fortigate because the juniper has the public ip and I need to forward ssl traffic to the listen interface