Where are you putting the battery, in the tail? If so, P5 and P6 are each about 1 ft in length. P10 (Engine Case to Firewall GND lug) is about 18" (runs from the lug on the engine next to the bottom left or right mount) to a point on the firewall near a structural member (AA2 or AA6). P11 runs from the starter relay to the starter motor -- figure about 4ft.