KcsXformSeq is the only class in the KCMS framework that supports connection (and connection is the only reason the KcsXformSeq class exists). The base KcsXform class uses a sequence derivative in its connect() method.
To make a connection, you can call either of two KcsXformSeq constructors (or use a combination of the two): one constructor takes a list of transformation pointers; the other creates a sequence of 0s. Then edit the transformations list with the list() methods. See "Validation" for additional information on the connection method.