Yeah, the 160 did have a video out port. Back when I was in my Powerbook phase, I'd routinely swap out the innards of one book and put it into the (better looking, less beat up) case of another. So I'm guessing that's what happened here.
The video output of the 160 is on a daughtercard which also carries the RAM. My guess is that this daughtercard has been pulled just leaving only the motherboard, probably not a lot of use without the card.