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You don't need to look for it in the DVD extra because it shows up in the second movie, when they display the Nostromo crew's bios on the screen during the board inquiry: Side note: the bios also show that Lambert was transgender:

Thanks! Also, Dallas' bio in Aliens also shows that he works for the Tyrell Corporation. Meanwhile, additional points from the Tommy Westphall universe has several interesting easter eggs, among others. https://tommywestphall.fandom.com/wiki/Blade_Runner