If a character has more than one Cargo Trailer, how much additional attack does it have?

One cargo trailer 🠪 +1 attack
Two cargo trailers 🠪 +4 attack
Three cargo trailers 🠪 +9 attack

Each cargo trailer checks for how many cargo trailers are on the bot. So, with three cargo trailers equipped, the first one checks, sees that three cargo trailers are on the bot, and adds three attack. Then the second one checks and adds an additional three attack and so on.

This is based on a Facebook screenshot shared on Discord of a question WotC answered

Source: Aequitas (2020-10-01)    【Link to Ruling】

Tags: Cargo Trailer, Cargo Trailer