how do i hook up fuel lines to these fittings? this is my first build alone and im confused.

 

Righty tighty... lefty loosey...

 

I am assuming you put those two fittings on right?Then you need braided line and an fittings for the lines and if the fittings were already in there when you bout the fuel rail and you are trying to use the oem lines then that won't work unless you find an adapter and I am not even sure if thats possible.Now if you are talking about which line goes where then the feed goes on the right and the return goes on the left of that pic.Don't quote me on that but thats how I think it goes depending on the car.

 

Most likely they are -6 an fittings u need. I have the fitting for the stock fuel line inlet side. I have the same rail buy did use the an fittings for inlet in let