newsouth gauge not sure if i installed it right

[TheHamstick]

installed it outside firewall to make sure it worked right and was hooked up correctly. but not sure i did it right. ive been told you can hook the vacuum line to the dv or the fuel pressure regulator. im just not exactly sure where the fpr is at. i think i hooked it up to it but not 100% sure. ive read every diy forum and cant find good ones with pics on the mk4s. any help is greatly appreciated