There's always a simple test for this if you google it for your type of car.
You need:
1 wall.
A horizontal line at a certain height on the wall.
2 vertical lines denoting where the lights should point.
Basically, you park the car facing X distance from the wall.
There are adjustment screws on the light units which you tweak to get them pointing correctly.
When your lights are pointing at the intersections of the lines, they're aligned almost perfectly.
It'll save you taking time out of work or whatever to bring it to a garage with the electronic gear, and it will pass an NCT check.