diagram for 2 dual needle air guages?

I was going to have a shop do it but decided to do it myself with some help from my grandpa.

Not totally sure on how to do it so I was wondering if anyone had some kind of a diagram to hook them up? Also if you could help me out with what fittings I need thatd be great. Ill be running 1/8" air line.

Do any of you know if places like Autozone/Pep Boys ect. sell them? I wouldnt bet on it but my grandpa wanted me to ask.

Thanks for any help.

bump

i have never seen them in stores like that, and be carefull not to kink the 1/8 line. i would use 1/4. the 1/8 will work fine its just easier to work with 1/4

Ok nevermind I got someone helping me. Im just going to get fittings online. Sorry grandpa .

Word I gotcha covered...