Wish this site had spoiler tags, but anyone this far down in this thread is probably looking for a solution anyway 😅

Push the silver down into the pit. Stack the gold on top of the silver. Undo until the silver comes out of the pit, so the gold falls in. You now have the hole filled, so you can push the silver down and around to fill the bottom remaining hole to put the remaining gold in the top-left, and then undo the silver to the start and get beneath it to fill the last blocking hole.