Not if the hoses are long enough lolso it looks like "sideways" is the way to go...which is what my dad wants to do. That way there is no additional tension on the lines as the bucket moves up and down. We saw one mounted "to the sky" at the dealer and it seems like in that position the hoses easily become too short when the bucket goes down...does that make sense?
I just put protective caps on mine.I can see using only male couplers pointed up vertically, but I wouldn't install a female coupler pointing upward because it would trap debris.
Most couplers I see installed on skid steers are oriented horizontally, but sloping downwards I suppose so they can be flushed out.