Here's another picture and info sent to me:
Thanks Curt!

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This picture shows a 200 amp 20-40 circuit combination service entrance panel designed primarily for underground feed but has a tunnel kit installed in the left corner that allows for the service conductors to enter through the top. The tunnel kit has screws that hold it into place located in the underground pull section so once the utility install its seals the tunnel can not be removed.

Curt

Bill