From my Classic Rig up this thread:

Barberhauler attached to jib sheet is the blue w. white fleck ending in a block w. becket...line runs out of shot to the right...:



...and into front beam at an opening near the outer gunwale. This opening has an exit block inside the beam, and a camcleat on a bracket outside the beam:



Then the line exits on the other side through a similar arrangement, ending at another block w. becket on the jib sheet.

You can now haul in the barberhauler from the opposite (ie. windward) side of the boat, causing the jib sheeting point to move forward & outboard on the leeward side.

Mike.