still need help, pics included...plzzzz

[zappattack1800]

ok so my truck has been down a few months now, its not starting now and to make a long story short here is what i have checked/replaced
1. replaced cps
2. checked valve cover wire harness
3. replaced fuel filter
4. replaced fuel pump
5. got a code reader but no codes.

now i just replaced my fuel pump and while i was in there i found a connector unplugged and have no idea what it goes to, its the first pic on here (if i loaded the pics correct) its a two prong weather pack connector and is on the driver side valve cover. now the other two pics are a connector i forgot to plug back in after taking the fuel bowl out, i know where it goes but after further inspection its trashed, can you tell me what it is? i think its the fuel pressure somthing-or-other but want to be sure...that may be my culpret. but if the connector to that is shot, wouldnt that throw a code? any ways thanks for the help fellas.
first pic is the one i found unplugged and it is NOT the one plugged in under the turbo...thats already plugged in

this pic is the connector that is shot, comes from under the fuel bowl i think and connects in the next pic


this is on the driver side of the fuel bowl, down in the front valley sort of and is where the broken connector plugs into

[roddy]

First picture is for the Exhaust Back Pressure Valve solenoid.
Not necessary, it puts engine under load by closing valve on turbo exhaust side to warm engine up quicker.

Think second pic is Water Sensor lead.
Could be the fuel heater lead, but that is on the passenger side