I see. That's clever - with the backhoe mounted there is probably no use for the remotes, and with the BH dismounted there is no use for the swing pump.... but when the hoe is dismounted there are these handy swing circuit connections which are lonely and unused.
But is there any advantage other than using two shorter hoses? - I'm assuming that on the M59/62 the hoses to the swing pump outlets would be closer than those to the power beyond port on the control valve.