I have the all-aluminum black mast with the old style jib halyard/downhaul block and use a jib halyard grip located on the port side of the mast where the top jib batten would rub the mast as Matt described.
I also have a main halyard grip (located a similar height as the jib halyard, but closer to the mast's luff track).
On my mast, the main's downhaul cleat (which is located on the back of the mast in the luff track) is located just above the starboard side cleat for the main halyard.
After hooking the slug on the main halyard at the top of the mast, I pass the slack main halyard around the starboard shroud and then snuggly tie it off on the main halyard's cleat on the starboard side of the mast.
Then after tying off the 3:1 downhaul for the main on the downhaul cleat, I take the last foot of the downhaul rope and loop it around the tied off main halyard and pull the main halyard back tight against the downhaul cleat and finish tying it off on the downhaul cleat. This pulls the main halyard further back toward the mast's luff track and makes it less likely to snag the jib batten ends. This only works if the main's downhaul cleat is higher than the main's halyard cleat. The main's downhaul cleat is in the luff track, so it can be repositioned without having to install new rivets.
