mouse-yank-secondary

mouse-yank-secondary is an interactive compiled Lisp function in `mouse.el'.

It is bound to <M-mouse-2>.

(mouse-yank-secondary CLICK)

Insert the secondary selection at the position clicked on.
Move point to the end of the inserted text.
If `mouse-yank-at-point' is non-nil, insert at point
regardless of where you click.