From your photos steel beems have to be welded to the embeded plates in the wall once the rest of the equipment is in place to allow a false wall to be built for the missing sections of baloney.Even the baloney floors have a steel plate in them.
I hope you have better luck with your P950 than me as i only used it a few times with 250 shoots/videos since March and it has to go in for repairs. Will ook at selling it once it return as I am not happy with it and doesn't meet Sony 400VX performance at 50 zoom. Wish Sony came out with a new model as I cannot get parts for the one I have. I just took the R7 out for its first run and a big different between it an the Mark II with a new learning curve..