I am about to get a used attachment I know nothing about. Specifically, I don't know the health of the hydraulic system of the machines it was used on previously. My question is how best to hook it up to my machine the first time. Here's my plan so far. Put two flat-faced couplers on the auxiliary ports without any hoses. Engage the auxiliary hydraulics and just blip the switch for a fraction of a second to determine which port the fluid comes out of. Hook one hose from the attachment to that coupler. Run the other hose from the attachment into an empty bucket. Run a hose from the other aux flat face and submerge it into a bucket of clean Bobcat oil, and then cycle the aux hydraulics. Does this sound like a good plan? Do you experienced owners/mechanics do something like this, or just take you chances?