They see thousands of cables and probably don't give any a second glance for the bare few seconds they gaze at each bag, an extra IC or two in the connector or not.
The sheer volume of bags that get run through those x-ray machines in a shift, and the time given to look at each one precludes too much fine grained inspection, especially for something as minor as cables.
Airport security is pretty dismal at detecting actual weapons or contraband, why should they be any better at noticing a slightly different cable?
The sheer volume of bags that get run through those x-ray machines in a shift, and the time given to look at each one precludes too much fine grained inspection, especially for something as minor as cables.
Airport security is pretty dismal at detecting actual weapons or contraband, why should they be any better at noticing a slightly different cable?