someone knoe what this wire used for? vfr 2002

Hi everyone,
Sorry for my english i'm A french guy and my english is not very good, i'm tried to do my best


So after a few ride this season my vfr started to making some noise (rattle) on the front left section. So I remove the left pannel and I think I found the problem


But I saw some wire with some electrical tape, the wire are disconnect And I realy don't know what they used for

Someone can helpMe?
are these wire aure important thanks a lot

 

the wire are just under the coolant on the left side

 

02 sensors... what do you have for an exhaust..?

 

I got staintune exhaust, stock header you think is the 02?

 

Yeah that looks like the stock header is still installed.

 

That is the o2 eliminator. Just wrap them up with heat shrink and tuck them away. Hope you have the PC iii go with the staintune set up.