From the description, your 1948 Cub has the standard U-shaped drawbar and rear rockshaft setup that was universal on Cubs before 1955. In 1955, the 1 point fast hitch became available, so later Cubs could have either. Most opted for the drawbar setup so they could continue to use their existing Cub implements, or because they were only buying the Cub to mow their lawns.
There is a fully-mounted disk harrow for Cubs with a rear rockshaft. It's a "#38" disk IIRC. This is what it looks like:
For trailing disks like this #23:
There is a way to change the angle of the gangs by pulling a rope. When the disks face straight forward, the damage to roads and lawns is minimal. It just rolls like it's on wheels.