Different people are on different tine zones - or have to go to work!
Yes, A0 is the two pads above the lettering, as for A1 and A2. Jumpering each of the three pairs with solder pulls down the corresponding address line on the chip, otherwise pulled up by one of the (nearby) resistors (I can't seem to lay my hands on that particular board just now to trace them out). A0 has the value "1", A1 the value "2" and A2 the value "4" in the actual address, there are eight possible combinations (including no jumpers) giving you eight possible addresses.