1) I got what looks like boom vang rigging with the boat (see pics). Where does it attach at the base of the mast? There is nothing there to attach it to. The boom has a metal U hanging down about in the middle that I assume the top hooks to (red arrow in pic). Am I missing something that bolts on with the mast at the bottom?
2) Does the boom have a topping lift? I have 3 pulleys at the top of the mast. 2 in FRONT. And 1 in back. The back one I assume is for the main sail halyard. One of the front ones is for the Jib/Genoa halyard. And maybe a 2nd for a spinnaker, which I don't have? Or does that 2nd one in front operate the topping lift for the boom by running the line backward to the end of the boom?
I have downloaded the manual, but it does not help for this detail. Clear pictures of a properly rigged Venture 22 would be like GOLD to me. I can't find any online.

I am coming to the conclusion that this boat does not have a vang. I have been scouring the internet for pictures with decent enough resolution to see the lines. Some booms don't have that U shaped thing. Plus, if I raise the pop-up on the cabin, it would hit the vang if I had one. I am thinking it didn't have one from factory and some hot rod decided to add it afterward.
As far as the topping lift goes. I can see what appears to be 2 methods of keeping the boom up. I see some pics with a topping lift line that goes "somewhere" up above out of frame of any picture I can see it on. Another is that it appears some people tie it up on the backstay with a short line and just let it hang there when the sails are down. That is what I may end up doing if I can't get an answer on the topping lift setup.
Thanks in advance for any help.

