Jumper Cable for Wired Video Doorbell install, .... is jumper cable needed?

Help! I have an existing wired doorbell system from my 1970's house. I have connected my "wired" Ring Video Door Bell per the Installation Guideline. (image attached) NOTE: I decided to buy a Chime Pro and use that versus the house's original doorbell box. Per the Install Guidelines, I installed the Ring Jumper Cable. QUESTION: In order to keep power running to the video doorbell, AND to remove the original 1970 doorbell box, do I use Option A (wire clamp the Jumper Cable to each end of the existing wires,.... or Option B (remove the Jumper Cable entirely and wire clamp the two existing wires together?) Hope that make sense, and my funny image is helpful. Thanks for any response!