Spark plug wires - lenght

[Patz]

Hi

I've baught a spark plug wire set for my WC-51 from my dealer in Norway, unfortunately i got the wires that's used on the round type of "cable go-through". I have the flat type, with the coil on the steering column.
Some wires are too short, and some are to long.

I was wondering if any of you guys knows the lenght of the original spark plug wires for the flat type "cable go-through"?