Maintenance
Page 25
The source module is now disengaged from the base module and can be
pulled away revealing the battery compartment.
To re-install the source module onto the base module, take the following
steps: Align the air inlet fitting and the locking pins into
the eyelet holes as shown. Press the two units together and slide the
source module upwards (relative to the base module) to lock it in place.
The two units should be flush and tightly secured at this point, then
simply slide the base plate back into position until it latches.