Clarification: which ever is at a lower elevation, furthest E or W, is the side one should put the actuator.
Example: Can see 139W, at 21.6° Elevation. All the way over to 30W, at 6.4° elevation.
Actuator is on the east. (although, in my case, I'm limited to 55W by mechanical limitations of the polar mount. Which I'm dreaming about correcting)
55W &
58W are 'nice ones to have' if you can get 'em.
EDIT: Yeah, last satellite azimuth works out the same > whichever side is the greatest azimuth from center would be the side for the actuator