If you can't get in the secret spot in Sandtrap the other way (as listed on this site), then here's another way.

Put two crates on the bottom diamond, then put a small crate on top of the crate and then put a reciever node facing downwards on top of the small crate.

After that erase the boxes and the reciever node should stay still.

Then put a two-way node right under the reciever node on the bottom diamond.

Thanks for tuning in!