This is an area were most people rush and then have failures when the robot is in the arena.

If you can form a box that is part of the robot (say fit a thin plastic bulkhead parallel to a bulkhead you already have) and line it with foam so the electronics can be shock proofed (the Rx antenna won't get ripped off by the wheels!!) you will find the better these things are fitted the longer they will last.

robots stop working because wires get trapped or something gets loose or something preventable has happened,
think what if this happens and try to minimise risk

The Saint because of the way it thrashes around should be very unreliable, but isn't because of the thought that has gone into making the parts fit well.

So take your time and get this part right in the end it pays