G'day Zen,
The bind plug shorts the negitive, & the signal lead together. When you turn the switch ON, this is what tells the RX to go into binding mode, ie the lights on the RX's flash, then when you hold the bind button, & turn on your TX, a GUID code is sent to the RX, this is what binding does, so that the RX responds only to that TX that has that particular GUID code, GUID stands for Globally Unique Identifier code. there are about 4 billion GUID codes available.
So it is not just there for show, or to remind you to do anything, it is there for a very good reason, & the pins are not supposed to line up with the positive wire, if it did, it would be a dead short, when you plugged the bind plug in & switched on the switch.