I understand your idea, but I’m afraid it isn’t possible. The steamer is a low pressure steam generator with interlock controls to just keep warm till cook time is set. It then generates steam to cook It operates at 3.5 to 4 PSI. Steam kettles commonly run with a 12 to 15 psi pressure. The increase in pressure corresponds to a increase in temperature. The steamer is running about 223 degrees F. But a kettle needs about 230 to 250 to work efficiently. About 7 to 15 PSI. You would also have piping that would not only supply the steam, but allow the condensate to return to the boiler. That would place the kettle at a point you would need a ladder to use it. Last is the BTU’s required for the kettle. You never told us what kettle, so I can’t even guess as to the size.