waste gate hose
 

I just received a used t78 greddy turbo kit. I was hoping someone could tell me what the hoses are routed to at the wastegate. There is one near the top and one lower and on the side. I always thought there was one line that went to the waste gate to bleed the boost seen by the diapram? also what is the hex bolt and nut for at the top? thanks guys.
Wouter