1. Pass each wire through the following routes then connect to A/C unit. (Manual air conditioner)

2. Connect the climate control unit connectors. (Manual air conditioner)
3. Install the climate control unit to the center panel. (Full-auto air conditioner)
4. Install the center panel.
5. Adjust the climate control unit wires. (Manual air conditioner) (See CLIMATE CONTROL UNIT WIRE ADJUSTMENT.)
6. Connect the negative battery cable.
Climate control unit removal
Climate control unit disassembly/assemblyMazda 6 Service Manual: Schedule 1
   U.S.A. and Puerto Rico residents - Engine oil flexible maintenance interval
Use when the maintenance monitor for “Oil Change” is set to “Flexible”. For 
details, see maintenance monitor.
Chart symbols:
I: Inspect: Inspect and clean, repair, adjust, fill up, or replace if necessary.
T: ...
   
Mazda 6 Service Manual: Engine removal/installation
   Warning
	Fuel vapor is hazardous. It can very easily ignite, causing 
	serious injury and damage. Always keep sparks and flames away from fuel.
	Fuel line spills and leakage are dangerous. Fuel can ignite and 
	cause serious injures or death and damage. Fuel can also irritate skin and 
	eyes. ...