Took an untraded villager and had them in a minecart next to a zombie (nametagged) in a minecart. The villager was converted to a zombie and left minecart. Tried to get villager into cart, and was unsuccessful several times. Ended up putting rails with minecarts in a small room. Tried for a 6th time, converted, villager could push carts around. Not connecting and locking into minecarts.
A "wild" or found zombie villager could be captured with a cart. Weakened, cured, and would remain in cart.
Duplicate of MCPE-76831