To slot in means to fit in, to join a team and match their style. Sometimes a player is bought and has difficulty slotting into a team, the manager can't find their best position, or they don't play well with their teammates. If they slot in, it means, like a piece of machinery, they fit smoothly into the team.
Slot Game
Game Developer
RTP
Mega Joker
NetEnt
99%
Blood Suckers
NetEnt
98%
Starmania
NextGen Gaming
97.86%
White Rabbit Megaways
Big Time Gaming
Up to 97.72%