Dynalite Packs/heads: How can I cut the power?

[fonefourandbethere]

I wanted to use my Dynalite M2000 packs in the studio after a move. Previously I only used them on location, usually in the sun so power was my friend. In the studio they're REALLY strong. Even one head on the lowest power setting is f/8. I'd like to take it down to 4 or 5.6 at the most for most things.

I know I can cut the power of each channel by adding another head, but I don't really want a light popping over in the corner for no reason. I used to know a guy that had dummy cords for his Normans that he could plug in and cut the light power.

Anyone know what those would be called and if they make them for Dynalite?

Thanksies!