For the stock marquee from Costco Pacman - after much searching I discovered it's a male 1.35mm DC connector - you're going to need a converter and a female to female adapter:
1. Male 1.35 to 2.1 DC Converter: https://www.amazon.com/gp/product/B07MQ9B8G3/ -
2. female to female converter (https://www.amazon.com/gp/product/B081Z7H444/)
3. Extension cable if needed (https://www.amazon.com/gp/product/B01M6C24XG/)
and this splitter! Use the other two connections on the splitter for the Amplifier and the LCD driver board (i.e. Jamma 60-in-1).
This product was a great value to have3 out was a space saver highly Recommended.