There are multiple ways that you can mount your slider to a tripod. The slider has several 3/8"-16 and 1/4"-20 tapped holes in the rail for mounting. Using your Manfrotto head and quick release plates, you can attach to those tapped holes to support. If the camera plate has a 3/8"-16 camera screw, you can attach to the center or either end, depending on the level of support you need. If you attach in the center it makes for easier run-and-gun setups. If that doesn't give you the stability you need, you can either mount a tripod on either end, or mount the tripod on one end and then use something like a monopod, light stand or c-stand on the other end, using the 3/8"-16 or 1/4"-20 tapped holes.
This video will also show several ways to mount to our products as well.
As you can see, there are multiple ways to mount the slider, depending on your needs and configuration. Thanks!