Customer wants to know where printer drivers should get installed when working with Terminal Server webapps.

If you are using terminal server then printer drivers go on the term server. Those will let you print from term server to a network print server. If you want printer redirection then you have to activate that and have the same printer driver that is on your workstation on the term server. This will let you be inside term server and print from a term serv app to your local printer.