Parallel Box Mod

Dual parallel Box Mod.
Fat daddy v4 510.
battery contacts keystone P/N: 228 and 209
the microswitch button is from mc0676 with minor adjustments to my bizarre micro switch.
This is mech mod and wrong use will cause severe injuries!!
Don´t build if don´t know how to wire and use it!!
You MUST use a mosfet.