has anyone had any experience with this?
also if it does fit on my squier and everythings all good what would i do with the big hole in the back of my guitar?
is that wire soldered to the part in the back important or is it ok to leave it disconnected since i would just be taking the old bridge out?
Send me off to bed forevermore.
If you don't like the hole in the back of the guitar, you'd have to fill it up with a block of wood, use a filler to make it seamless and then paint. Does it have a cover plate?

As for the wire, that's the ground and it's got to be connected to the bridge. In my bass guitar (non trem) it has a hole drilled diagonally from the middle of the bridge through to the cavity with the tone and volume pots, and the wire's fed through it. I suspect you'd have to do that