That one looks very familiar. I believe it is mine from no. 104.

For clarity the photograph shows the subframe upside down and the front of the vehicle is at the top.

There is enough room under the rear of the car to slide yourself in and see this without having to lift the vehicle. When I bought no. 104 I did just that and found the corrosion of which the seller was unaware. Take a torch and something to tap with, and check both sides. There was no actual hole when I bought it, but I quickly made one with my finger.

Andrew