No mods delivered (yet) at Atlantic Yards B2 site, but some mystery pallets at B4

A view of the arena block at 8:15 am today

Despite an announcement that the first modules (aka "mods") for the B2 tower adjacent to the Barclays Center would be delivered last night, no deliveries were made.

Neither Forest City Ratner nor Empire State Development has circulated an explanation, though the anticipated snow falling this morning seems a reasonable factor.

It's likely the delivery has just been delayed slightly, and the mods will arrive today or tonight. The schedule is supposed to be four during the day, from 10 am to 2 pm, and four overnight, between 10 pm and 5:30 am.

There were some deliveries yesterday: pallets at the B4 site at the northeast corner of the arena block, as seen in the photos below. What's on them? I'm hoping to learn.