Presuming you a talking about a WAECO fridge ?
Not sure what "wiring harness" you are talking about. The standard Waeco lead comes with a cig lighter / heavy duty combo plug at the end.
They do make a heavy duty wiring accessory kit ( RAPS12R-U2) which you wire direct to the car battery - is that what you are referring to ?
I helped someone wire one of those up in a Prado on the weekend - it was very simple - the crimp terminals provided were OK for attaching to the bolts on the battery terminals.
We need a bit more info.


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