Thanks for the help everyone, after fiddling around with it I understand why now
As long as I'm at it, and instead of opening up another thread, can someone explain to me how to properly solder the positive and negative wires into the 510 battery connector?
I've been looking at the image of a prewired connector on MadVapes but I just want to make sure I got this right. Basically the positive wire should go in the center and soldered there, while the negative wire should be soldered off to the side? Am I missing something?
My first attempt at modding forgot to take that into account before epoxying the connector and switch, so I tried to solder the wires with everything in place, nearly melted the whole case