I have the M6E OC panel mounted in my tower and the cable that plugs into the back of the M6E OC panel does not have a positive lock and just falls out. Anyone else have this problem?

Considering what I paid for this I think that there should have been a positive lock on the cable. I also do not think that I should have to tape and/or tywrap the cable to the OC to get the cable to stay in place.