sudomod

Hi, im hoping for some help with my GBZ power wiring.
See attached diagram.
I get 3.7v where bath connects to gearbest booster
But I dont get anything on the terminals where it goes out to the safe shutdown switch.
When I go back and test the battery im getting less than 1v.
I must have something wrong and its draining the battery but i cant see it.

Can anyone check my diagram and help me out?

Thanks heaps

I have no idea how to help you, but i do have a question for my own knowledge.
Why do you have power going from the battery and from the booster to the Safe shutdown board?
I don't have something like the safe shutdown board, so I am interested for future knowledge.