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Okay, let’s see if I can answer this one without stuffing up. Bear in mind I have never seen a heq5.
The goal is to make sure your polar axis is pointing at the South Celestial Pole. This ensures that the polar axis is parallel to the Earth's axis of rotation, which is crucial for long exposure astrophotography, but just more of a nice convenience for visual observing.
If the heq5 is a traditional German Equatorial Mount and the Latitude scale runs from 0 deg (Horizontal) to 90 deg (Vertical) then you should set the scale to your actual Latitude.
From a previous post, wedges as used on fork mounted SCT’s require that you set the wedge altitude scale to 90-Latitude. This means that the base of the mount is also at an angle of 90-Latitude, which ensures that the fork tines point to the SCP.
Does the heq5 have a built in polar alignment scope?
Cheers
Dennis
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