Both of them are the same — they are connected in parallel. 2 is a SMD solder jumper (you can directly solder across it); 1 is reserved for a through-hole jumper but it’s currently unpopulated. Originally we plan to solder a 2-pin header to that so that you can use a standard jumper to connect the two pins. But since OS 3.0 was released last year, we’ve been recommending OSBee only for Latching valves, because for non-latching valves OS 3.0 would be a much better fit.