i see like a metal clip thingy i have no idea i have a manual but don't tell me poo poo please help thanks

 

On the back corners of them there will be a semi-circle in the "litttle metal clip thingies." Get a pen screwdriver and pull on side of the clip off. Be careful not to bend them or lose them because you'll need them to get the injectors back on. Once you get the metal thing off, the clip will slide right off.