I have never installed a 12V/Aux port on a 2010 Honda CR-V either, so I can’t give you any specifics, but, in general…
the 12 V plug is going to have two wires going to it, one comes from the positive post on the battery and should be fuse protected, the second goes to a ground or the negative post on the battery. I’m hoping you can just grab the plug, and possibly a wiring harness and plug it in. Again, taking the parts off a doaner car will tell you exactly where it should plug in.
The Aux plug should have one wire that runs to the back of the radio, but again, exactly where/how will be evident when you get the plug/wire from the junkyard. Your radio says “CD/Aux” so I’m hoping you DON’T have to grab the radio from the yard as well.