X2 to what Drick said.
Be sure to clean the solder connections with isopropyl alcohol, heat shrink it then electrical tape it. You want it to be as near air tight as possible. Moisture can find its way in there through humidity, condensation, rain, etc. If it does over time it will start to oxidize the copper and basically rot out your wiring and you'll be looking at a more in depth (and expensive) repair. Do it right; spend the the extra couple of bucks on heat shrink and take the extra 10 minutes to properly finish the job. Those 10 minutes and $4 now can be the difference between enjoying your machine or enjoying downtime and potentially expensive repair.