Its the black plastic tube in both side shrouds, when we replace this shrouds at the shop we insert the top in the swage terminal with a heat gun , 1 inch or 2 , that way the bottom dont collect water
, or dirt... problem is, catamarans sailing downwind got their mainsail
chafing in some cases in the shrouds, now if you want to get rid off the black thing, good luck with that, its very hard to cut , and its several feet long.
My sugestion, climb to the top with a heat gun , heat the plastic top tip a bit , with help from the bottom insert the tube in the swage 1 or 2 inches and next time you replace the rigging
order the wires without the black tube. Cheers.