The Handy 193875002 Instruction Manual page 9

Attach the metal hook into the connector hole.
Attach the grassbox to the lawnmower body by sliding the holes on the front of the bag over the
hooks at the front of the cutting height roller.
Attach the hook at the end of the support chain to the middle bar of the lower handle, to raise the
grassbox from the ground. If the grassbox appears to sit too low, loop the chain around the middle
bar an hook into a link of the chain.