Board Thread:Questions and Answers/@comment-27701424-20160303054640/@comment-27441457-20160303212640

In the manga it's not quite clear, so I guess it's just a matter of aiming your hips in the right direction and deciding which grapples to use for the best movement in the circumstances.

In the anime, specifically the first No Regrets OVA, it looks like there are little switches (not present in the manga) on the handles that also control the vertical angle of the grapple.