Yeah we actually sell the wiring, Deans connectors, motor connectors, and the V3 trigger contacts so you could actually re-do the entire system.
http://www.airsoftstore.ca/index.php...ex&cPath=35_13
The wiring we stock is actually 16 gauge wire but the external diameter is like 18 gauge of most other wires so you get more power and it's easier to run the wire.
Just based on what I can see, and confirming what lurkingknight has said, You need:
A1 - get a soldering iron, tin both the fin ("B - the circled thing"), and the A1 wire, and just solder it. You'll need to melt the solder and pick off the bit of wire that's still stuck on the fin first.
B1 - new motor connector (if you want to get real fancy, you can just solder the B1 wire directly to the motor. This will give you more contact area between the wire and motor and more power)
The motor connectors are $2.50 and the V3 trigger contacts - if you NEED to replace it is $4.
Or you can get the whole thing pre-wired for you for $35:
http://www.airsoftparts.ca/store2/in...oducts_id=1642