Re: Making connections to the back of a printed circuit board
Yep, solder, then hot glue to keep the wires from pulling away. I did mine this way a few years ago, and it worked a treat. I used small gauge solid (not stranded) wire too (had some left over from my garage door opener safety eye installation). The solid wire makes it a bit easier due to its stiffness. I also used my smaller pencil tip soldering iron, versus the larger big pistol grip soldering gun. Then I sharpened the tip a bit, and proceeded with caution.
Heat the wire first...hot enough to melt solder...then "tin" it (i.e. - coat with solder). Give it a tap while it's hot, so there aren't any solder dingle-berries. This way, you won't need any additional solder as you'll have plenty between what's already on the pc baord, and the coated wire.
Heat the pin point spot on the pc board while pressing the new wire against it. Once it begins to melt, immediately back off the soldering iron, hold the wire steady for a few sec's while the solder solidifies and "Bob's your uncle". Now, you just need a little micro momentary switch on the other end.
I wish I could think of clever things to say in my signature.