Leave it as is. It's part of the design:
"Outer contact
The outer contact of the nextgen™ RCA socket features a double-wave design embracing the socket‘s solid Ultramid1 body. The intelligent wave form insures that a reliable contact is made any time with any standard RCA type plug and, of course, with the new nextgen™ WBT RCA connectors. It is very much due to this special wave design and to the reduction of the conductor material to the optimum, that WBT-0210 is free from distortions including eddy current. Furthermore, the nextgen™ technology is also the secret of WBT-0210‘s ability of transferring signals ultra rapidly."