Again thank you wnii and dougrainer,
I bought the monitor panel with the switch for water pump as I wanted to keep the whole thing looking like a clean install and have to remove the old system completely. I will look into trying to retro fit the old pump switch into the new unit or buying a new switch.
Another thought, can I bypass the Intellitec controller completely and just have the new on/off switch operate the pump and have the other two switches inoperable? The pump controller is mounted right by the OEM tank monitor panel.