I have searched but a little confused

I have a tial wastegate and a turboxs mbc and i was wonderig is it better to hook it to the top vacume port or the side vacume port on the wastegate. How do you hook it to the top. just run it to a vacume source? do you still connect the side port to a vacume source if you hook the mbc to the top port?

 

Hook it into the side port. I have the dual stage mbc and I called turbo xs and tial and they both said to use the side port unless you are using an electronic boost controller.

EDIT: leave the top port open.

 

thanks