Hopefully someone with more experience than me can chime in on this, but I will explain what I know, hopefully it helps.
There are two different ways to set up the MBC, mine is set up like the second one, or last diagram you posted.
Either way works, if you don't "t" it off and run it to the BOV then you will need to run a vacuum line from the BOV to the intake/TB... Not exactly sure where mine runs on the Evo at the moment. I will look in morning and maybe post pics of how it's set up.
Search on the advantages/disadvantages of either way to set it up.
But as stated if you can't get this to work, try getting pressure source from the turbo and do the set up from the last diagram (like how mine is set up)