Complex sentence: In the FC Twin, the NES cartridge still has to be reseated occasionally; the pins can misalign and short across each other or otherwise fail to connect properly; you have to maneuver the game cartridge until it works.
Split into simpler sentences: In the FC Twin, the NES cartridge still has to be reseated occasionally. The pins can misalign and short across each other or otherwise fail to connect properly, requiring users to maneuver the game cartridge until it works.