Prepping OpenWrt on a RBM33G for mwan3

The RBM33G has a single default WAN port and two LAN ports. Has anyone been able to make the two LAN ports be WAN ports and the WAN port be a single LAN port in order to accomodate mwan3?

Ok, this was almost too easy, hope it helps others quickly. Now, the annoying wrong labels, how to go about changing WAN to LAN and LAN1 to WAN1 and LAN2 to WAN2?