Complex sentence: All regions have the same connectors, and a cartridge converter or simply removing the casing from these will allow them to fit into the other regions systems, however the systems are also equipped with lockout chips that will only allow them to play their appropriate games.
Split into simpler sentences: All regions have the same connectors, and region-locked cartridges will fit into the other regions'systems by using a cartridge converter or by simply removing the cartridge's casing. However, the systems are also equipped with lockout chips that will only allow them to play their appropriate games.