This might be a stupid question, but the LA502 is my first real solder project, so I'm not very experienced: On the RLY1, do I need to solder all pins to the board? Because there are two pins that look like they aren't meant to be soldered (the two closest to the edge connector of the PCB board). I am assuming they are just extra holes so the relay fits into the board. But since there is no mention of them in the documentation, I just wanted to make sure that I am correct in this assumption. Thanks!