I use MPF.Check to generate a stub !submissioninfo.txt and it places three locations for Mould SID codes into the file
Data Side Mould SID Code: (REQUIRED, IF EXISTS)
Data Side Additional Mould: (REQUIRED, IF EXISTS)
Label Side Mould SID Code: (REQUIRED, IF EXISTS)
I've just submitted my first verification (hopefully correctly!) and noticed the form didn't make a distinction for the Data or Label side. I'm clueless as to whether this is oversite or adjusted behaviour. Thought I'd highlight it.