bobcat 853H High Flow Switch

[12acrefarmer]

I bought a 853H that needs the main relief valve adjusted. I understand how to set the low pressure. To set the high pressure the manual says to turn on the High Flow. There is supposed to be a toggle switch located left of the operator seat to engage the high flow. There is no toggle switch there or anywhere else I have found. Does anyone know how to engage the high flow hydraulics when there is no toggle switch on a 853H?