So, after spilling several gallons...

Take your tap fitting to the hardware store and the hose you need to connect to and they will hook you up.
 
Doh, I could use my kitchen faucet and a longer hose instead of trying to make the bathroom sink work. The kitchen sink is closer than the shower and it's pretty deep, with normal threads and a couple attachments for changing them. (I live in a pretty small apartment. :-) )
 
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