Indesign Align Object

Trying to develop a script that will align an object horizontally center and vertically to bottom.

This is what I have but can't get it to aling to the bottom

tell application "Adobe InDesign 2025"

                set selList to selection --assumes more than one item selected

                tell document 1

                                align align distribute items selList align option horizontal centers

                                align align distribute items selList align option vertical centers

                end tell

end tell