hard to tell what's hitting where ....
the back side of the hopper looks right - the base plate notch is shallower than the notch in the rear hopper frame bracket.
the idea is the base plate should hit the beau socket mounting bracket and stop the hopper before the two beau plugs bodies touch each other. If the plugs can hit, they will eventually crack.
I guess the question then is ... how much of a gap between the plug bodies should there be when the hopper is installed? I don't have a machine with a new style hopper handy to check, but on a 929 with an old style hopper, the answer is there's a tiny gap, so the gap between the plug and socket in your pic may be a bit big, but if the base plate is hitting the socket bracket, the only thing ya can do is move the socket bracket back - but that's unlikely to be the problem. Seems more likely it's the wrong handle.
in the below pic of a 1072, the socket bracket screw in the interesting location is different - possibly for clearance. If you remove that screw on your machine, is your problem fixed? Notice the line across the bracket where the base plate is hitting it.
p.s. this is a great example for why high resolution pics of game internals are really useful. I actually cropped the below image from a picture that is 3x too large to post on nlg. If you're bored, please email as many highest possible resolution pictures of your game internals and game front to slotpics@cdyn.com and I'll make them available on
https://bingo.cdyn.com/slots/. Sticking files on a cloud drive and letting me know where to fetch also works.
ideal pictures are the entire sides of units and also angles so the labels can be read. Both sides of stepper units. If sending from a phone, make sure to send "actual size" so they don't get downsized. Typical images there days are over 3MB.