I believe you just replace it where it was initially resting. In an amateur match you just come to an agreement between the two players but I suspect the pros will use the TV cameras to see where it was initially stopped.
Brooks Koepka @66
Rafa Barbrera Bello @100
Bernd Wiesberger @200
+SkyBets boost on McIlroy or Day but that was mainly to qualify for a free bet. Dont think the big boys offer great value
All with SkyBet paying 8 places