I removed the engine cover, an if the brackets your talking about are the ones I see looking somewhat like a letter L laid out flat with a turned up section dead behind the fuel rails and both having a turn down finger behind the manifold, they sort of look useless to me also. Maybe they are there to prevent any possible rearward moving of the fuel rails (if that's possible). If its those brackets, I guess its a "take your best guess " on what to do with them.