I can't stand those Xcelorin senor wires, they are SOOO long! I just swap those things out for shorter ones.
When you have little or no room in a car, I've found it's just better to shorten all the wires up. If you decide later you want to move the electronics over to another type of car (i.e. a buggy) you can always make an extension or solder new wire to the board that is just long enough to fit the new chassis properly.
How do you like that TB03 anyway? I am so tempted to pick one up.