I have no idea what a "tube motor" is so I'm assuming that you understand the pinout there and have the power connections right.
Looking at how you have your relays wired, you have the potential to create a short circuit if both relays are energized. That's not a good idea unless you're the type of person that never writes software bugs and never has a hardware failure.
The + from your main power should go to the common of the first relay, the NO output of that first relay to the common of the second relay, and then the NC and NO of that second relay should go to 3 and 4 of the motor. This way the first relay controls power on/off and the second relay controls direction.
Terry's wiki on relay boards
does a great job explaining how to hook these things up.