Pololu for stable connection 3in1 module

Hello, I want to use a Pololu 3.3V StepDown for the power supply of the 3in1 module in my Devo7e (the Eachine protocol loses the binding in case of fluctuations). Where can I connect this? A photo would be helpful.

Thank you.

have a look here bud >> www.deviationtx.com/forum/7-development/...dule?start=780#52623

Thank you Exactly what I was looking for ...