Servo Extension Connector Lock Type B - Blue (10 Pack) from BenchCraft - BCT5076-048
Disconnected servo wires can cause crashes or other dangerous damage with your RC model. Eliminate the risk of a disconnected servo with a handy Connector Lock from BenchCraft.
This Servo Extension Connector Lock "Type B" wraps around the servo wire connector and the servo extension connector to ensure neither is inadvertently pulled out. A couple of dollars could potentially save you hundreds or thousands in crash damage!