Easiest way to figure out how something is done in the wiki is to hit the Edit button and look at the code. If you can't figure something out, ask on the community portal talk page, or in the wiki forum here. Check your "my contributions" link to see if anyone has cleaned up behind you (a couple of us more active folks will usually do that when we know someone is new), then go look what they did.
For the record, we're not so concerned about documentation as Wikipedia is. If you have something useful to share, add it.