Either something is missing from the box my connectorized 900Mhz 450i came in or I'm not smart enough to figure out how this thing is supposed to be mounted. I've tried finding manuals for it but everything I find is for the 450 radios which look nothing like this radio. I also bought the Cambium 900Mzh sector with it and I see no way of mounting this radio to the bracket on the antenna.
I would contact your distributor and let them know. Hopefully they or Cambium can dropship one to you. Otherwise just use lots of electrical tape wrapped around the antenna and AP. haha We have installed almost 20 of the AP's and so far they have all been good, but I suppose someone could have packed yours on a Friday afternoon and forgot to add them.