Captain Truant incomplete

I left Captain Truant incomplete because I was under leveled and went back to Sanctuary, played a few side missions and now I cannot find the way to get back to Athenas to reach him…Ellie’s portal only takes me to Meridian…cannot progress because Captain Truant is a main mission…please help

You dont see Athenas when you go to map and press Y (or whatever the input is for orbit view, I guess triangle?) ?

Thanks…went to the wrong map downstairs…lol…I finally beat him…thanks again