Judging by your pics, I'd cut off 1/4" behind your stripped ends, re-twist, then tin the ends. If they fit then, problem solved. If not, cut off tinned ends, carefully cut a few strands out. Re-tin, try again. All that bare copper exposed, with an occasional stray strand looks like an invitation to disaster for your equipment
How close are you to Hartville -Marlboro twp. area? Perhaps I can help. Jerry