I'll state here that this is a bit of a guess - Knitmasters select and knit (or whatever) within the carriage, there is no needle preselection - so they are less obvious than Brothers. Hopefully these pictures will help anyone having problems with their carriage. Click on one to embiggen. This is a punchcard carriage with side levers.
Needles in A (non-working) position
Needles in B (working) position
Needles in C position
Needles in D (Hold) position
Plain (0) position