a) Alien Queen whole front view concept drawing (for Aliens released 1986) presumably by James Cameron.
b) Costume design for Roy Batty in Blade Runner (1980) by Charles Knode
(as posted in the Blade Runner Art, Fashion & Photography 2019 /2049 group on Facebook)
c) So here the cuffs become the position of the hands
d) The man on left inspires shapes and forms in the left hand, (and I might wonder if some of that went into the Alien Queen's left knee to lower leg as well)
e) So the oblong shape on the back becomes a gap in the hand between the joints and tendons
f) Collar becomes the crest.
g) Right arm and shoulder becomes the right alien queen's lower arm and hand
h) The lower right arm inspires the shape of the right hand
i) Middle to lower abdomen becomes upper torso