This rare arrangement is used when the flyer is performing a trick that involves them passing backwards between the fly cables AND making a half turn (before or after). The lines are passed between the fly cables and are then wrapped around the flyer so that they unwrap during the trick and do not tangle.
ATTACHING: As you face forwards on the platform, hold the safety lines in front of the fly bar. Pass them backwards over the bar and between the fly cables, then bring them under the bar and connect them to your belt as per Half Turn Lines (face backwards, attach the lines, then turn forwards).
TRICK EXAMPLES: Front Hip Circle Catch
You can find out more about this trick in my books: