Good news is I removed the panel to the left of the head door, then cut a section of the pan out behind to see if the post terminated on the sole or was carried to the hull. Was able to slide a work light forward under the port banquettes and light the area, then peep thru the hole.
Looks like there is a glassed over box/plate under there that does carry the weight all the way down.
Pics later, off to the coast for the weekend, have to undo all my rushed un-hurricane prep work from last weekend..
