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I have done this... but i've no idea what "chest puzzle" you're on about :/ sorry...
Edit: Found this in a walkthrough, and I think this is what you're looking for:
"There are 4 switches. To continue use them in the following order (they are numbered 1 to 4, from right to left): 1, 2, 1, 3. Now you can reach switch #4. Before pulling it, close the chests so they match the set-up in the previous car:
open open closed
closed closed open
Once you have the chests set up like above, pull the switch and the wall will open allowing you to go on to the next car."
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