Hey all. Recently I purchased a micro switch from ebay with the intent to replace my generic Tekin RSX Pro on/off switch. I have images of the newly purchased switch, the original tekin switch (with + & - partial leads attached and the switch in the "off" position):

New Micro On/Off Switch (eBay link to switch)

Tekin RSX Pro ESC

Original Tekin RSX Pro ESC On/Off Switch (switch is in "off" position)

Tekin RSX Pro ESC Switch (new in package advertising image for clarity)

Upon closer inspection of the new switch image I've provided, you can see, from left to right and in red font "1b 1 1a". I assume these are polarity designations? I am not sure, if this is possible or safe at all, where to solder the + (red) & - (black) leads from the ESC to the new switch given 1b 1 1a. Any and all help would be greatly appreciated.

It's just a switch, open/closed. Solder the black to one lead and the red to the other.

Thanks!

why does a on.off switch have 3 wires?puzzling

It is just a switch and most of them come as a 2 position switch

You can buy the same size switch that will fit inside the plastic mount. The one off ebay picture is a rocker switch.
6pcs MICRO Slide Switch On OFF 3 Pin Mini Toggle Interrupt PCB diy | eBay Make sure the size is the same as the old one.

you can add a charge option

Not to a switch of an ESC, that trick only works of a receiver battery of a gas powered RC model.