There is no charge for the first two pieces of checked luggage in SAS business class TATL.
Here is how SAS goes for SAS-operated flights for US-EU travel:
1 x 23 kg: SAS Go Smart, SAS Go Bonus
2 x 23 kg: SAS Plus Smart, SAS Plus Pro, SAS Plus Bonus
2 x 32 kg: SAS Business, SAS Business Bonus
No bags included in SAS Go Light