Well I've figured out what I think is the best method to do this, I really need to take a picture to explain but essentially you put on one headlight normally, then take the other one (mounted on the strap and everything) and put it on top of the first one so the light is just above the first light and the band is sort of diagonal so the back of the band is towards the bottom of the back of the skull. This way they're both kept separate so no worries of removing them from their holders or anything. I tried a similar setup by velcroing my H600 to my H602 which worked fine but it ended up being very unstable having the H600 mounted so far from the connection to the headband, it also looked really dumb. With the two headband method they're both very stable, completely separable and they're both close and tight to your head so very stable.