If you mean that the "nipple" that screws on to the spark plug was "missing" this is correct - these cars don't use those nipples. Some do, others dont. That's why they usually can screw off!

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Current:
2021 Charger Scat Pack Widebody "Sinabee"
2018 Durango R/T

Previous:
1972 280SE 4.5
2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
1999 Chrysler 300M - RIP @ 221k