Boot Switch Here are the parts needed for the build. They are - heatsrink tubing, DPDT switch, and two LEDs and connecting wire from an old case.
Boot Switch Remove the wire and connector from the plastic connector. Cover the connectors with the insulating heatsrink tubing. Remove the LEDs from the wires. Two of these are needed, one for each drive.
Boot Switch This is a two way switch, either/or. Solder the wires to the switch. Notice the stager of the wires. This way only one set of wires will be connected at a time.
Boot Switch Attach the switch in a convenient location, and attach one set of wires to each drive. On the drives, put the connectors on the jumpers that will set the drive as device one.
Boot Switch The drives in the machine are in the lower front of the case. I used a 3.5 inch cage from on old case. Now the drives are right in front of the input fan.
Boot Switch The Western Digital as device zero, becomes the boot drive.
Boot Switch The Segate as the boot device, device zero.