stand down on cable

I wanted to build the PC control cable for the NexStar 11" SCT. Ultimately, so to drive the N11 from a computer. I had brought my tools, including crimper, and parts, including serial DB9 connector and Registered Jack. But then I discovered I had brought the wrong size RJ. The cable needed to plug into the hand controller and, like the handset of a telephone, it required the small 4P4C jack. I had grabbed a regular 6P4C RJ14 phone jack.