A cable tray junction includes floor panel and a post secured to the floor panel. The post includes a splice plate connector defining a female coupling component. A splice plate interconnects the post and a cable tray. The splice plate includes a post connector, which defines a male coupling component received in the female coupling component to connect the splice plate to the post without the use of a separate fastener. The splice plate connector may have a curved groove and the post connector may have a tongue received in the curved groove. A wall panel connector of the post defines a wall panel groove in which a wall panel is received to connect the wall panel to the post.