which engine, we cant guess it.some are diesel and have no spark plugs.x2, some engines have distributors if yes, the high voltage spark wires, clearly go to the spark plugs.on newer gas engines, they have coil pack oreven COPS. coil over plugs. and those must come off to reach the spark plugs.some cars have coil pack, see those HV wires, same dealthere, covered all classes of engine. one post.dizzycoil pack 1 or 2.COPS2001 line up1.3 L M13A I4 (petrol)1.5 L M15A I4 (petrol)1.3 L I4 (diesel)case in point M15see this photosee these, its a mix of coil packs and cops.called wasted spark cops.
they fire on pairs with wasted spark setup.1 and 4 fire together, as clearly seen above.the HV sides are wired in SERIES to do that magic.nexg time post country and real engine name.we cant guess, either. here, on the WWW !