so what are these plugs for?

[Nappien]

After taking out my Windshield washer tank due to bad rubber seal, i decided to take pics of some connectors I have no clue what their purpose are









pic of the tank out and me cursing findind the seal broken:

[RealMcCoy]

ECS connectors, front O2 sensor connector, EGR temp sensor connector, MAFS connector, fuel pump resistor connector....

I take it you didn't mod the car yourself...?

[Nappien]

i paid a workshop to do it, and they did a poor job. I always feel they missed plugging something together..
Im too much of a noob to be doing something like that myself as I always seem to do something wrong, and loosing bolts inside the engine compartment is my specialty.