What type of mobility scooter battery is this?

Been tasked with finding a replacement battery for a mobility scooter...

is this a casing i need to unscrew to then find a 'normal' looking battery inside? As I can't find anything that looks like this online

https://preview.redd.it/b4fy89qypxzg1.png?width=1200&format=png&auto=webp&s=c682b80c577455ab9514a7cab565c06d4b8a1989

https://preview.redd.it/vkv144gzpxzg1.png?width=1200&format=png&auto=webp&s=4d3b0fe604db99a988274aedfa890e0288b92418