IMPORTant Si

I just upgraded from the Greddy 18G kit to a Precision SC61 and tial 38mm on my 99 Si. My question is, does both vacuum nipples on the WG need to be routed somewhere? I have a Blitz DSBC, and the hose was routed to the external WG on the greddy. Which nipple does this line hook to on the Tial, the top or side? Also, where is the best place to route my vacuum hose for the nipple that sticks out of the compressor side of the turbo? Thanks in advance.

-James