I have recently discoverd that Mazda screwed some owners by not installing the box saying it was not needed. Why do the fuel line upgrade and install the box after the better hoses were installed and then say some had the better hoses and do not need the box. BULLSHIT!
To install the box requires the jumper harness if the engine harness is the early original.
The later new harnesses has the two extra connectors built in.
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