what we need:
3x panel in 5U with 1U width
3x switch UM 4pol to break all lines.
3x led holder 5mm
3x led (green or red)
9x powerconnector 4pol (microphone female) http://www.reichelt.de/B-604/3/index.html?&ACTION=3&LA=446&ARTICLE=4546&artnr=B+604&SEARCH=B+604
9x powerconnector 4pole (microphone male) http://www.reichelt.de/Mikrofonverbinder-fuer-Funkgeraete/M-604/3/index.html?&ACTION=3&LA=2&ARTICLE=11162&GROUPID=5189&artnr=M+604
