In the silent installer DMG there is a SPSS_Statistics_Installer.bin and an installer.properties file. I edited the installer.properties file to include our authorization code (you'll skip this and instead edit the LSHOST section to specify your license file). I placed those files in a temp folder on my machine that I was building from and built a package using Composer using those two files along with including a post install script ( /private/tmp/SPSS/SPSS_Statistics_Installer.bin -f /private/tmp/SPSS/installer.properties as well as a line to remove the files the package dropped into the temp folder). That package drops the installer and properties file into the temp folder and runs the install using the properties defined in the installer.properties file.
Since we also have the firewall enabled I had to add firewall exceptions using a script. I created the script through the JAMF web console since it didn't work well through the package for me.
I then created a policy that included the package followed by the firewall script and used that to deploy through Self Service.
Since you're using the silent installer you'll need to have java installed on the target machines if you don't already.