OnMouseDown how can i get object that clicked

player There are several players in the meeting. When one of the players clicks on an item (for example, a battery), a tall script with an increase (OnMouseDown) on a battery. Thing The script with OnMouseDown () is worth visiting. When someone clicked on an item, the function above was executed. The functions have a script variable that the player visits, and I have to look at exactly who clicked on that script, that is, take a line to the player who clicked.