SSH Tectia Server (M) always installs to /usr/lpp/ssh2. You have several options of how to create the ssh2 directory.
If you want to put the product into a separate HFS or ZFS file system, make an empty ssh2 directory under /usr/lpp:
Create the file system and mount it on /usr/lpp/ssh2. You can use the CREAHFS and MOUNHFSSAMPLIB examples (see Appendix CREAHFS and MOUNHFS). The sample files are for HFS but ZFS can also be used. Note that mounting the file system causes an operator query that must be responded to. You may want to copy the mount command into the BPXPRMxx member in PARMLIB so that the file system is mounted each time you IPL the system.
If you want to install the product into an existing file system, for example the one where /opt is mounted, make an empty directory in that file system and create a link to it under /usr/lpp: