No Supply folder in ThirdParty/<Mcal_µC> folder of your delivery?
For new deliveries, MCALs are no longer part of the MICROSAR BSW Package delivery (exception: Vector is MCAL reseller) and has to be purchased directly from the hardware manufacturer.
In this case, please use the two mentioned documents in the reference below.

Use the document TechnicalReference_3rdParty-MCAL-Integration_<µC>.pdf for a concrete MCAL and the description in the User Manual UserManual_MICROSARClassic<OEM>_<SLP>.pdf in the section MCAL Integration and Update.