Need help finding out what trans is in my S15

[Need help finding out what trans is in my S15]

5 speed, pretty sure its a RB25 trans

[Need help finding out what trans is in my S15]

So I just bought a S15 Spec R of my boss and before him was imported in 2010 and its had a transmission swap done. You can see the adapter plate and custom mounts and I'm not sure what transmission it is, any help would be appreciated cheers