91 civic dx vacuum

i might just be an idiot, but i cant figure out how to do the vacuum on my car, i recently picked it up for 600 bucks, it has the d15 in it, the previous owner swapped the old d15, only 30k miles, when i got it the guy had the vacuum hoses plugged up, all shitty and scrambled all over. The diagram on the hood is for the stock motor, this ones a bit different for some reason, and its really hard to follow, if anyone can post a doagram of the vacuum system i would really really appreciate it :) thanks