Seafoam through the brake booster line

Tacoma 2002,
2.7 - 4 Cylinder

Hello,
I would like to use the seafoam spray through the brake booster. However, i already used Sea Foam in fuel, but i have few questions:

1) Is it safe to use the Sea-foam [Spray] instead of sea-foam [liquid] through the brake booster?
2) Does the below image is the right line to pour the Seafoam?
3) Does sea foam reach to the 4 Cylinder or only 2 [Each car has a different situation, what about Tacoma 2002]?

Thanks

 

Recent discussion:

https://www.tacomaworld.com/threads/sea-foam-in-brake-booster-vaccum-hose.604065/

 

I know guys have done this for years, but I'm leary. Just don't over do it. I've done it twice and ended up with check engine lights, so I tend to stay away from seafoam nowadays.