First you'll need to get the formats registered in CAS. Information on that is here, http://go.documentation.sas.com/?cdcId=calcdc&cdcVersion=3.3&docsetId=caldatamgmtcas&docsetTarget=n0jtz261h5qtg7n1j6ql02gd65lo.htm&locale=en.

You can apply registered formats to tables at load time. If loading with the CASUTIL LOAD statement, you would use the VARS option, http://go.documentation.sas.com/?docsetId=casref&docsetTarget=n03spmi9ixzq5pn11lneipfwyu8b.htm&docsetVersion=3.3&locale=en#p1gvn79hc0o7izn1egadg659q6da.

You can also apply formats to already-loaded CAS tables using the ALTERTABLE CAS action, http://go.documentation.sas.com/?docsetId=caspg&docsetTarget=cas-table-altertable.htm&docsetVersion=3.3&locale=en.