Peplink Drop in mode with two WAN circuits

Hello all,
I’m looking for a scenario with two WAN links connected to B1 and I want my router to be behind B1. Could you please guide if I can do the below scenario.

  1. I want to connect two WAN circuits to B1 and the static/DHCP public IP needs to be on routers WAN 1 and WAN 2.
  2. Objective is to avoid any sort of NAT at B1 level and my router need to do the NAT where required.
  3. What are the steps required to achieve this?