How to reattach a tub overflow pipe that is offset from the tub
All you need is a thick wire that can be bent into a U-shape at one end.  Place the cover back into the outlet hole, insert the U-shaped wire into the outlet pipe and try to grab the outlet pipe to hold it in place. Lift the outlet pipe and slowly screw the top cover to the outlet. Tighten the top cover to the outlet pipe with a pair of pliers.