I need some help still with getting the Olmec head boulder onto the second pressure p

[Guest Squint Grimjaw]

I appreciate the prior attempts to assist me, letting me know about the wall that Urgon's piece can be used on in the trap corridor, but I have the second head boulder right on the edge of where the floor slants down.

How do I get it onto the second Pressure plate?

[Guest Squint Grimjaw]

Figured it out.

 

[Guest rumrill]

I'm still stuck unable to move that 2d olmec head. How do you do it?