J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment Barber Hauler

I recently purchased a J30 and found what looks like two barber haulers as part of the rigging / equipment
Can someone on the list please send a link to a picture / diagram as to where this is installed.....I have no example to follow at my club
Is it used for the Genoa or the spinnaker?Thanks in advance