Instead of running a hose around the rear of the engine u can connect the source from the plenum to the existing hard line that was originally used as the bleed from the solenoid back to the intake ....
This is the blue line in the dia. U can make a loop from the "boost source" to where is labeled no. 9 and blank off no. 14
Use this to feed the new solenoid, disconnect all other hoses and run a new line from the solenoid with a T piece to split to the two actuators
Some compressed air will help to identify hoses