All you have to do to make a simple baybus is get one SPST per fan you want to control, an led and led holder per SPST, some black and red wire, some speaker terminals and a project box.
1. Attach terminals to project box
2. Solder a short red wire to each red terminal
3. Do the same with the black
4. Solder all of the same color together, black and red
5. Solder a long wire to each color, and lead it thru the side of the fanbus
6. Plug these wires into molex, red is 12V, black is Ground
7. Rip off molexes off fan if applicable
8. Take red wire of fan attach it to a terminal on the SPST
9. Attach some red wire to the other terminal of the SPST and plug into a red terminal on the baybus
10. Solder the positive LED leg with resistor onto the fans terminal on SPST (resistor = (source voltage - forward voltage) / current)
11. Solder the ground of the LED into the fans ground
12. Plug the fans ground into the fanbus
13. Repeat for each fan
14. Drill holes for leds and switches into faceplate
15. Attach SPSTs, tighten, attach led and led holder to faceplate
16. Velcro fanbus to inside of case out of the way if you prefer
17. Done! (If i didn't miss anything)
