PARTsolutions installation routine, in the CAD integrations selection dialog box select
the desired interface (here in the following figure exemplified with CATIA
After the installation the interface
directory is found under $CADENAS/iface/catia ($CADENAS stands for the
installation path of PARTsolutions).
In the directory
"catia" you can find another directory named according to the respective
CATIA version like "V5R20" for example.