Doug,
I cut the sprayer from my back pack and just attached a female hoselock attachment (no jubilee clip required) and away I went.
The end of my pole hose has a male brass hoselock attachment that fits into a standard female fitting.
The only problem I've found is that when I want to change poles I have to turn the back pack off first, otherwise water keeps on pumping out.
However a local window cleaner showed me his hose fittings he got from Gardener Poles. It has a shut-off so that when you disconnect the pole; no water is pumped out and the pump stops pumping.
Here's the link:
http://www.gardinerpolesystems.co.uk/acatalog/Pro_Fittings.htmlI've ordered some.
Obviously you require one to fit a standard sized garden hose (for your back pack) and a male fitting that fits the inner diameter of your pole-hose.