Photos
I'm an idiot...I was on board my boat yesterday and could have shot a bunch of photos. However, my boat is not factory and might just confuse you as it has lazy jacks and single line reefing. Do you have some specific questions? I am pretty sure that I can walk you through it if you send photos and then perhaps we can set up a time for you to call me from the boat.
I'll give it a shot at a general description. Forgive me if it is 101 and you have other questions.
You should have two sets of lines with two sets of opposed blocks on them. These are the main sheet and boom vang. The main sheet attaches to the traveler and likely to a loop or three loops (depending on the set up) of stainless hanging down from the boom either midway (if the traveler is on the cabin or at the front of the cockpit) or at the end (if the traveler is at the back of the cockpit). Typically one of the sets of fiddle blocks has a cam cleat on it. That is the bottom set.
The boom vang connects to the base of the mast and to a loop closer to the mast. Once again, the set with the cam cleat typically is on the bottom.
The boom could have several lines associated with it. If there is a line about mid boom coming out of the side with a cleat nearby with line running inside terminating at the aft end of the boom (note could terminated in cable, not rope, but be rope at the cleat) that is the outhaul and connects to the bottom aft grommet on the sail for adjustment (loose in light wind to catch more, tight in high winds).
If there are two more smaller lines, usually colored, running through the boom from front to back terminating near the mast one end with lots of extra rope and terminating at the aft end near the boom vang termination, these are your reefing lines. There are a lot of different ways these can be run. Mine even confused the surveyor I hired.
There also may be some form of topping lift, or a couple. Mine has two, a fixed cable from the masthead and a short cable crimped to the back stay. This connects to the boom to hold the mast up when the mainsail isn't up holding the mast up.
Good luck,
