you will most likely find the wiring isn't present in the orange plug in your car assuming your car doesn't or hasn't had the mirror previously. Also the boss on the windscreen will most likely be different as most cars with auto mirror also have the rain sensor. I have done this retrofit and if you're prepared to have the correct screen fitted then your best option will be to unpick the wires you need from that loom and run them down the drivers side A pillar as the connections are to the power control unit which lives in the dash to the right of the steering column which means that the wires you have will reach the area they need to. I have the connections wrote down somewhere if you take this on.
If you're only interested in getting the mirror working then you could change the boss on the screen but it will require the correct glue to fix it to your screen and you will need the breaker to let you cut it off their screen.