Buick Lucerne Brake Booster Line for Seafoam

Hey guys,

I'm trying to find out where the Brake Booster line is on my car because I want to use Seafoam. Can anyone tell me where it is located? I believe I know but I'd rather be 100% sure. I tried looking online but couldn't find anything for my car, 2007 buick lucerne. Even tried googling the same for the following:

· 2004–2008 Pontiac Gran Prix
· 2005–2009 Buick LaCrosse
· 2006–2008 Buick Lucerne

Since all have the same L26 3800 Series III motor with no luck.

Here is a picture of what I'm sure is the Brake Booster line (circled in red):

http://buickforums.com/forums/attachment.php?attachmentid=6552&d=1414602545

(I am unable to insert a picture on this forum)

Just an update, this is the brake booster line.