Shift + Insert key to work for pasting from Clipboard on terminal

How can we have Ctrl + Insert key and Shift + Insert key to work for copying and pasting from Clipboard respectively on xfce terminal, so it must be in state of NumLock is Off in order to correspond to being Insert key.

Why is it having ie. feeding and echoing numeric value instead, correspondingly to keyboard layout, usually, mostly is number 0

while only if just NumLock is on then it will do such expected job which is an outright opposite to other applications' behavior

ShiftInsert and Shift0/Insert has different scan codes - which is why you get different results.

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