Almost looks like the reed cage bolts were too long and they hit the cylinder. Has a similar mark on the other cylinder too. Post a more clear picture.
I meant post a more clear picture of the actual spot where it is leaking. take one from above showing both inside cylinder base studs with the leaking spot.
I don't see a hole and it's really hard to be sure about the orientation of the picture. It looks like the head is off and this is a shot of the two cylinder nuts closest to the reed cages and coolant hose that attaches to the head. Nothing in this photo should have a hole in it. It looks like there are spots of weld and a bead of weld on it. Am I seeing that right? Mark where the hole is and take a photo showing more of the motor. Maybe place your fingertip where the hole is. Sent from my SM-S908U using Tapatalk