as was mentioned,
take your time,
one wire at a time,
make sure there are no bare wires, or power directly to ground,
and the next thing you know, you are done.
If you want to test to see if two ends of a wire are connected, use an inexpensive multimeter or a battery and a test lamp.
Alligator clips are a great way to find out what goes where without making it permanent.
They can be bought or they can be made. It is easy.
Good Luck.
Again, take your time.
-Ride On