I think I need help...

I have an igs file of a rubber electrical connector boot.

Upon opening, a window informs me that "This file contains free curves/points which are not desired according to the import options.  Do you wish to import them anyway?"

If I say no, nothing happens.

If I say yes, 9 features open in the tree, but none are visible and all are composed of curves.

Should I change some import settings?

I have a sldprt file of the same part which only contains a single imported body.  When I attempt feature recognition it fails both manually and automatically.

Is feature recognition expected to work in that case?

I need to rotate the wire outlet by 180 degrees and the part is not symmetrical, so I am down to just chopping off and redoing the whole top end where the wires exit.  But I do not know how to construct the closed end.  I can add the wire outlet once I figure out how the faceted sides taper and close.

Any help would be much appreciated!

Thank you!