Incorporate "Modern Accordion" in CPT portfolio [archive] template

I have a script for “Modern Accordion”, which consists of a JS and CSS file. I stuck the JS file into assets/js/plugins (via roots-master theme root) and the CSS file into assets/css. I have a CPT entitled, “Portfolio” wherein I wish to utilize this script…

So I have a archive-portfolio[.php] template, plus a content-portfolio within the /templates subdir.

Links to open any accordion section are supposed to be the corresponding title attribute of whatever div within the designated accordion container div.

Any clues as to how to get this right. Thanks a mil in advance. really.