Yep, so if you have a refractor handy with a 1.25" focuser, put the laser collimator into it and point it a wall about 6-10 meters away. If you place a targe on the wall, like a huge crosshair (make one on your computer) A4 sheet size is fine. Switch on your laser and see if the line (yes LINE, a laser pointer is not a dot!) rotates when you rotate the laser in the focuser. Adjust the screws on the laser to minimise the eccentric rotation. There you go, you've now collimated your laser collimator.
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