Hello, I do not possess a Rio.
I do not possess a Rio and do not have access to the rear suspension diagram; however, the rear subframe appears to have a straightforward design, and I would surmise that it can accommodate both drum and disc brakes.
I assume you are relocating components from your previous subframe, such as the shocks, springs, and hub carrier, among others? The calliper bracket is typically affixed to the hub carrier.