OK, I confirm that.
Longitude: 145.0814°Satellite: 156.0E Optus C1
Azimuth (true): 17.4°
Azimuth (magn.): 5.7°
Now, on your mast bracket, set it at 38. Elevation.
On the other side of the same bracket, there may (should) be markings for Latitude. Without moving anything, that should read ~ 45.
These markings allow for the Offset of your dish and vary depending on the particular dish that you are using.
This is why you set your dish elevation different to that of a Prime Focus Dish. This will hopefully clarify what you need to set.
Let me know if all that is clear?