If they're like a regular HB's I think you can run both pickup's tap leads to the same spot and ground both coils that way - no need for anything more AFAIK. A single pole should work if you have one.
thanks. I thought you had to have the equivalent of 2 of the switches and was expecting something that would have a total of 12 connections on the back. Much appreciated.
I just drew a little sketch and I'm not so sure you can connect both tap wires to the same connection because when in HB mode the two tap wires will still be connected to each other. Maybe you do need a double pole switch. I really don't know, never done it.
I think you can do it with 4 connections at the most.