A warning should be before this step that this step detaches from the primary heat sync. The required tools should list the replacement thermal paste at the beginning, not after the step is already to have been completed.
My PS4 Pro 7115, this and more is integrated with the main plate, as noted above, plus there are 10 in this area (not 8), along with 2 over the fan and 1 to the edge of this area. Model CUH-7115B
My PS4 Pro 7115 has additional sets of #0 Phillips screws on the plate. 10x in the primary processor space (blank plate area of the graphic here), 2x over the fan, and 1x on the outside edge to clamp down on the primary processor area. Model CUH-7115B