When you get your supplies, practice soldering wires together.
The trick to solder tiny things embeded in in soft plastic is proper preparation.
Test the plastic to get an idea of how easily it melts. Touch the iron tip against a non-critical spot on the motor body, noticing what it takes to melt it. It won't be much.
Practice tinning two wire ends. You should be able to quickly add solder to the ends leaving just a tiny ball of solder on the tips of each of 2 wires. Then practice attaching the 2 wires by touching them together and very quickly remelting the solder on them to make it all flow together. Smile ya done good.
Take a sharp knife point and scrape the oxide coating from the solder terminals on the motor. Close inspection should show a mostly shiny surface. Tin the terminals. Remember how quickly the plastic melts and don't linger anymore than necessary.
Tin the wire. Melt the 2 together. Then do the other one. Congratulate yourself and celebrate with an adult beverage.
Brushed DC motors are ambidexterous. Attach the wires to a battery of the appropriate voltage and it runs in one direction. Reverse the wires on the battery and it will run the other direction.
Have fun. You just learned something that less than 1 in a 1000 people know how to do.
Stay away from that Red Kryptonite. It's evil stuff.
John