Mid remote for function

[erichalverson0360]

I have what appears to be some kind of mid remote that is operated via a handle. It is feed from the PB off the loader control valve. Can I feed a 3rd function? Any one seen anything like this? Would I be better off feeding a hydrualic control valve directly off the subject PB.

 

[Mrlunchbox]

Pictures may be helpful in this case.