OP, here is my suggestion, go to ACE hardware or Lowes, etc. ask for concrete screws, at least 2.5 inches long this should give you at least 1.25 inches in the concrete wall. You can get the self tapping tap (tapcon) or the type that requires an insert (concrete drill ans suitable insert).
If you are not comfortable with this, send me a PM and I can help you install.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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