If you just wanted to swap the running light contact for the headlight contact, you could just swap the wires left to right. What you're doing is instead of using the center to top connections, you use the center to bottom connections. With how short the wires are, i decided that the easiest way to accomplish this was to flip the entire board around.
The wires go onto the same relative positions they went on before (the "top" 4 spots), but now you're making use of the part of the switch that has never been used previously. You solder to the center posts and to the two posts shown that currently have no solder on them.
As you can see from the pictures, the heat source is the connection between the top post and the rocker, and not between the pivot and rocker. One of mine is clearly black from heat in the picture.
My failure was on the running lights as well, but i know other people have had the headlight part go as well. originally the heat simply melted the actuating nub. only later did the joint unsolder.
'78 280Z - 3.1L MSII Neverending Tuning