Yesterday I was installing an amp, so I decided to run the RCA cables thru the middle of the car. I had to remove my center console piece, so to do that I had to remove the shift knob. Took the screw on the side out, twisted the shift knob to see if it would screw off, it turned but not just the shift knob, the whole thing,shift knob and the plastic piece connected to the shiftknob turned and I ended up disconnecting the overdrive button. I panicked and didn't even get to hook up my amp. Couldn't figure out how to re-connect the wire that goes to the O/D button and on top of that, now when I shift the shift knob will not lock into place. I tried a night long to at least make it shift right but couldn't get it to work properly!

It shifts and everything but if I just lightly push on the shift knob it will change gears without pushing the push button! I can be driving, go to change the station on the radio and accidently throw it in to reverse. Very Dangerous!
Does anybody have any suggestions?
I don't know what to do?