<Installdirectory>:\SPB1630\tools\capture\tclscripts\OrCAD_Capture_TclTk_Extensions.pdf
or
<installdirectory>\SPB_16.5\tools\capture\tclscripts\OrCAD_Capture_TclTk_Extensions.pdf
or
<installdirectory>\SPB_16.6\tools\capture\tclscripts\OrCAD_Capture_TclTk_Extensions.pdf