Finding Fuel?
 

I recently purcheased a Nitrous Express kit from a friend its a 50-175 adjustable wet plate kit so heres my question whats the best way to tap into my fuel system? the guy I bought it from said he thinks NOS makes a line to go from the schreader valve to the selinoid but I cant find anyting? this in my mind would be the easiest and safest way to get fuel...any suggestions?

All the kits include the adapter for the fuel rail but if you need one they are $7.95 at Jegs or Summit the last time I ordered one. Autometer is the manufacture that they sell.