The Kyosho LA-41 parts bag contains the velcro (hook & loop) strips for holding the body to the undercowl. Kyosho calls it ‘magic tape’.
For the Lazer, the provided strips are cut into 4 pieces of 10x50mm. The hook side (hard) goes on the inside of the body, the loop side (soft) goes onto the outside of the undercowling.