According to the parts book adjustable camber plates and matching kingpins were introduced in May 2011. Given you have a 2013 4/4 it should have these. Camber measuring tools, as below, that magnetically attach to disc are available via Amazon or eBay.

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Chassis needs to be laterally level though and as John mentions steering dead ahead. Handbook confirms camber at 0.5° negative.

Note the rounded top of the kingpin each side forms the pivot point during camber adjustment, if necessary. Kingpin top bolt as well as lower nut need to be loosened a little therefore before adjustment can be made. Worth checking tracking as well, best performed at a garage/tyre shop equipped with laser measuring equipment.

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone