Installation process is same for Extension plate for Husqvarna 701 Luggage rack.
1. There is no need to remove Luggage rack. Just align holes and slots on the Extension plate with holes and slots on the Luggage rack.
2. Use provided M6 countersunk bolts, washers and safety nuts. Just use standard box wrench from bellow and hex key from above. No need to tighten up too strong - safety nuts are used. Just make sure there is no free play between Extension plate and luggage rack