bee r rev limiter

hi guys my mates just bought a bee r rev limiter. ive looked on a feed already which had where to connect the cables to the ecuplug. one thing I noticed is there is 3 rows of cables on his ecu and on the diagram theres only 2. another thing is where your supposed to connect the yellow cable theres no cable there on his ecu. its a 2003 model. Don't suppose anyone could help? cheers.