Splitting aux hydraulic line

I’ve been researching to put electric splitter valves on the aux line for my KX121-3 so I can use a grapple with 4 hydraulic lines. Has anyone ever done this?

Also on the left joystick handle is there an OEM switch I can put in to be hooked up to the valves?

TIA

I’ve been researching to put electric splitter valves on the aux line for my KX121-3 so I can use a grapple with 4 hydraulic lines. Has anyone ever done this?

Also on the left joystick handle is there an OEM switch I can put in to be hooked up to the valves?

TIA