I'm a first year German learner and I am enjoying learning the language so far. One of the things I learned was the dative case.
I have a question about this line that I made up for a how-to.
Du steckst das Ladekabel in dem Adapter. (You plug the charging cable in the adapter.)
Would this be the correct usage of the dative case? I'm not sure if I'm supposed to use "dem after the "in".