Electrical problem
1999 Saturn SW2 4 cyl Two Wheel Drive Automatic 181000 miles

I am trying to change the battery cables on my 99 saturn wagon and I can see where three of the four cables are attached and are easy to get to, but one of the positive wires goes under the engine and I can't see where it is attached. Can you tell me where that is and if a novice is able to do something like that? Thanks