Translations:KAVAN Orion A3 glider kit 930mm - Instruction manual/30/en

From KAVAN RC Wiki

Secure the side tow hook 52 to the left side of the fuselage using two screws 53 – refer to the building plan. The tow hook is adjustable – you can move it forward on a windy day or backwards on a calm day in order to achieve nice and steady climbing during the hi-start.