I need some motor help again

A soldering iron is basically a rod with a handle that heats up and let's you melt solder on the tip, they come in a veriaty of shapes and sizes but for people like us who aren't professionals you can get away with having a cheap one that's rated around 30w, you can see a soldering iron in ucwepns video, I don't know what country your from but like this http://m.ebay.com/itm/220V-40W-Electric-...nav=SEARCH

I have no affiliation but I'm suprised how cheap they are?
You'll also need some solder, I've found leaded solder to be best even if it's being phased out for health reasons. there are lots of videos on how to do it on youtube,

Yes if the metal is broken it will probably not work, the metal acts as a wire to carry the battery voltage, if it has broken all the way through and is not touching, your motor power circuit will not be complete and it will prevent your motor from getting the volts from the battery, if you are going to buy yourself a soldering iron, you should be able to bridge the gap in the broken metal with some solder, or you may be able to solder a length of wire between the broken bits, which would complete the circuit, if you don't solder it, I'm not sure how you would fix it, many moons ago super was asking about conductive glue, that might work in this application?
If you know it has broken and it works when you reassemble it, I'd still want to repair the break as in time it may lead to intermittent running issues

Ah, thank you, Tramp. This is actually very helpful. I think it would still work even though it's broken, since there are no gaps, but not for long, as things could rattle about and unconnect eventually, so a soldering iron would help, too. I'lkl probably just wait until I get one.