You are putting far too much imagination into the cable termination. It simply will not affect SQ.
Another option is to buy new cables from a rental/exchange place - Bluejeans cables is one - try a set & send them back to try another set; lather/rinse/repeat ad infinitum
Another option is to buy new cables from a rental/exchange place - Bluejeans cables is one - try a set & send them back to try another set; lather/rinse/repeat ad infinitum