6 o'clock but I don't use any holes in my airsoft barrels. Why bleed off air pressure and slow the gun down?
When reassembling the gun make sure the breech bushing is seated properly and the aluminum barrel goes all the way back and holds it in place. If it's still not shooting right, make sure you resoldered the wires to the gun motor correctly. What? You didn't break any wires? Here's a medal for ya!!!