https://www.amazon.com/LOT-TYCO-ELECTRONICS-KUP-14D15-24NEW-BOX/dp/B014PNYCDI/ref=mp_s_a_1_1?crid=1LVWDF4QJ0BXK&keywords=tyco+kup&qid=1669583481&sprefix=tyco+kup%2Caps%2C120&sr=8-1 The link to this shows someone handling them which helps show size. If it’s not quite long enough im just going to cut the old one off with enough length and solder to it. But they look pretty long
To anyone who finds this thread in the future trying to do the same as me, there is a great way to add rca to this jukebox. The CD input uses a standard 3 pin molex connector. The middle pin is ground, and the left pin is left channel and right pin is right channel. Simply get two female rca cables and solder the grounding shield to the middle pin and the left and right channel to their corresponding pins, like so. I will post later on how to install a switch to override the amplifier shut off once I can get back to the jukebox, but until then, this will get you auxiliary