Vacuum routing question

Just on sorting out the black car and have a couple of vac piping questions surrounding the boost controller and external wastewates.

Question 1

Should the vac/pressure from the suction pipes be taken from both sides and then T'd into the boost controller solenoid or can I just take it from 1 side pipe?

Question 2

Same question really but for the side ports of the external wastewates.

For info, the boost controller is a greedy profec b spec 2. The turbo system is greedy td05 16g with external wastewates. The intercooler pipework is 2.5", so not standard. The turbo to intercooler pipes only seem to have 1 little outlet on each side.

This knocked up photo kind of shows how I'm going to have it setup if I only need 1 rather than a T and both sides. Hopefully it's easy to follow