Athearn SW1500 Calf Digitrax DZ123 Install

For our practice run on setting up lights upside down inside the shell of the SD40s, we'll try putting in 2 LEDs into an Athearn blue box SW1500 Calf which happens to be one of the tightest spaces to install electronics. We're using a Digitrax DZ123 decoder, a super platform and some 2 pin disconnects to get everything inside the shell.