Honda EU22i Manuel De L'utilisateur page 44

4. If two generators were connected for parallel operation, disconnect
the parallel operation cable after stopping the engines (Except B
type).
NOTE:
If the generator will not be used for a long period of time, refer to
page 48 for information on Before storing the unit for an extended
period.
RECEPTACLE BOX FOR
PARALLEL OPERATION
(SOLD SEPARATELY)
41