u shouldnt be swaping it out if u have to ask! haha j/k but its commen sense they dont fit all the holes on the block so witch ever one fits good goes there i guess i dont know i suck at explaining but here are some pix maybe they help or someone else can use the same pix to helkp u out ...
i believe the lowest one witch i think would be the thinest one on the block is the oil line ....
these pix are a lil old but lmk if u need more pix ill be glad to help ... id just need to go outside tomorrow morning and take em so yeah