Passive Perception for NPCs for OGL 5e Sheet

What is the correct attribute to pull the passive perception stat for NPCs from on the new sheet? I take for example, the Goblin Boss that comes with Storm King's Thunder. It has listed a passive perception of 9. When I use passive_wisdom the value is 10, when I use npc_passiveperceptionbase I get 14, neither of which are 9 obviously. I'm trying to set the red circle to the correct passive perception on my NPCs using TokenMod.
I find it easier to calculate it manually. [[10 + [[@{npc_perception}]][PERCEPTION] ]]