Those two things you see sticking up in the picture are little metal clips. Typically you place them over the top of the tongue of the boot in front of the laces...then pull the powder skirt of your pants down over them. You can also purchase longer wires (extensions) that allow you to place them in pockets in your pants, on a belt, velcro'd to your leg...whatever you want. You can also use any of the Therm-ic brand battery packs instead of this Burton branded version of them. The top model from Therm-ic has a wireless remote control that you can wear around your neck with your ski pass, stick it in your pocket...wherever. You still mount the battery pack on the boot but you can control it from the remote without having to bend down to your boot, or raise up your pant, etc. It is a Lithium Ion based battery pack and is called the Liionpack. The remote is called the ThermiControl.