I think the plan of action should be:
1) Check connector for any loose strands of wire; if there are any, remove and retest
2) Take out all batteries, put batteries back in and retest
3) Change the batteries for fresh ones
4) Remove the crimped connections from the connector by very carefully levering up the small plastic clip on each wire with a tiny screwdriver, being very careful not to break them. Then while holding the clip up, slide the crimped connection and wire out of the connector. You may want to give the part of the crimp where it clamps over the wire a squeeze with pliers. Just make sure not to clamp down on any of the crimp where the pin from the receiver would enter. Try this for both the red and black and I'd advise removing the white wire entirely using this same process and leaving it out. Then, put wires back in and test.
Hopefully that helps and you can get something going soon; the chassis looks awesome, very nicely cut. Hot glue sticks really well on polycarbonate so that would be the way to do it in my eyes and also gives a bit of flex which is essential against spinners. Superglue apparently causes the polycarbonate to weaken.
I look forward to seeing your progress. Best of luck with the troubleshooting!
![Very Happy :D](./images/smilies/icon_e_biggrin.gif)