Just for reference, here's a virtual representation of where the transmitters are on Mount Wilson (green dots on top of the mountains). This is an approximated view in Google Earth from your location. On a clear day, this might help you visually inspect your antenna to see if it's pointed in the right direction.
Note that with your antenna, a +/- 20 degree aiming error is probably not going to make much of a difference (your signals are strong and your antenna has a relatively wide beam width).
