Cut out this bit with the razor knife.
Cut and fit the new piece in and trim to fit.
The mud and tape will cover any gaps in there. It doesn't have to be perfectly straight or fit precise.
And if that white wire with the yellow wire nuts is 120v live, you've got to put it in a box and put a false plate on it (or another plug there.) You CAN'T hide boxes in a wall / ceiling etc. and having dead ended wires 120v in there is also unsafe and illegal.
Cut and fit the new piece in and trim to fit.
The mud and tape will cover any gaps in there. It doesn't have to be perfectly straight or fit precise.
And if that white wire with the yellow wire nuts is 120v live, you've got to put it in a box and put a false plate on it (or another plug there.) You CAN'T hide boxes in a wall / ceiling etc. and having dead ended wires 120v in there is also unsafe and illegal.
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