I'm pointing with my finger to two areas I found bolts missing. One picture is behind the alternator under the fuel lines. The other is where the wiring is near the fan/shroud. Please let me know how I can figure out what types of bolts are needed because I believe there's different metals they are made out of? I'm sorry to sound stupid on this but I want to replace whatever appears to be missing correctly. Additionally, if there's any specific functions I would expect to not be correct with these bolts missing in case they are supposed to have something else attached etc, please inform me. Thanks! I'm not sure if they're simply to secure something or if the one behind the alternator for example is a grounding bolt of any type.