starter motor cable

Battery Cable - Flexible

Black 170a is Ok, 300amp is even better.

Get the flexible cable as it is better to turn onto the starter and battery

5m is ample.

 

even better, it also depends on the starter. The original draws huge amounts of current, the gear reduction unit is much more efficient. Don't forgot then terminal tags.

While you are at it, check the charging circuit cable too, that is always prone to terminal corrosion and high resistances. This then melts the insulation which then shorts out, which result in a fire. If it doesn't do this then it fries the battery because it is overcharging all the time.