I was workin on my car last week and my friend was helpin me out. I had an oil leak on the back of the block where the oil pressure sendin unit was and the oil feed line was for my turbo. Well my friend accidentally grabed the wire that went to my knock sensor.. so i bought a knock sensor thinkin it would inclde the electrical harness too... but i didnt need that he just messed up the electrical harness.. how do i fix this?

 

resolder the wire together with heat shrink tubing.