Service DEF System / DEF injector test & replacement on 2018 Ram Cummins. Code P202E / P2048

My 2018 Ram 3500 threw a code for DEF system. I found that my DEF injector was bad. It should be an easy job, but my hardware was rusted away.

Link to the injector I bought (same brand part as the original):
https://www.oreillyauto.com/detail/c/standard-ignition/standard-ignition-diesel-exhaust-fluid-def-injection-nozzle/std0/dfi3/v/a/145144/automotive-truck-2018-ram-3500?q=def+injector&pos=1