Ohhh I have wonderful memories of those.
One of my first jobs was at a place that used those beasts. Roll of paper maneuvered into place by me and a colleague, arms come down and out so that we can line up the roll with the holder, press the load button and watch as the hydraulic arms pick up the roll and lift it into place.
Next steps were to feed the end of the paper through the various rollers, ending with the 45 degree roller in the bottom of the printer (where in other places the box of paper would be).
The fun part was that they also had the folding table at the end of the printer (yet more rollers to navigate), when that went wrong it was a race to stop the printer to avoid a huge pile of prints piling up between the printer & the folding table.
Having said that, the 'cold fuse' variant of that printer was a dangerous bit of kit but that was a later job and I knew enough to avoid it like the plague.