SWMM Control

Hello,

I'm simulating a stormwater network  where I have a pond. in the pond outlet channel I need to introduce a stop control structure and assign a orifice gate where I can open/close it with SWWM control set  

using pond water level. My issue is , in SWMM control set, how should I introduce(keyword) the pond? (as it is not a node).

Thanks and Regards

Nishadi