In case the info helps any one here the Kitty TE (Same as Cthulhu) requires a Multi-tap to function correctly. If directly connected it won't allow you to control the SSDS3 menu. It does however work if you hot swap to the stick after getting into the game. If you use a Multi-tap the stick will function completely and allow proper switching between 2 button and 6 button configuration.
PC Engine 6ft extension cable. Don't overpay on eBay. These are the same ones being resold all over the place. Will not fit the Turbografx 16
https://www.monoprice.com/product?c_id= ... 1&format=2
10ft Pc Engine Cable that's a good choice for putting a RJ45 plug on for the Kitty or Cthulhu. Same cable I use.