Replace 6 pin on/off switch on Power Bank with 3pin or 2pin?
Looks like only 2 of the 6 pins are used. It's a simple on-off. The switch itself is a "Double Pole Double Throw", but the two poles are tied together to make it single pole (like a 3 pin switch), and one throw is ignored, making it 2-pin.

You can see on the underside of your board which pins are tied together with traces. Bridge those pin pairs to turn the board on.