This is kind of tangential, but it seems to me that anybody who ordered a battery board will also be wanting a battery pack at some point. It also seems to me that, like myself, some people may forget that they need to connect said battery pack to the Senoko board, and will neglect to add the appropriate connectors to their parts order. So...
-If you haven't ordered parts yet, think about connectors.
-If you HAVE ordered parts, and don't want to pay shipping just for $2 worth of connectors (and then wait for them to arrive), you can almost certainly find them in an old desktop you probably have lying around. The main power plug is the standard IDE power connector, and the cell tap connector is approximately the same as the power plug for floppy drives. It might take a little sanding or cutting to trim down some of the keying, but it appears that it should fit (looks OK visually, haven't actually tried it yet).
Hopefully this saves somebody some time/money/frustration! If not, we can all just share a laugh at my blunder, and the rest of you can congratulate yourselves on how forward-thinking you are. 