I doubt if it will work in your case. But BITD the Park Hcw-11 was the tool I used to adjust those style of cups. Please note I said adjust, the tool tabs don't provide much, if any surface to torque on.

Amazon.com : Park Tool Slotted Bottom Bracket Adjustable Cup Wrench, 16mm : Bike Hand Tools : Sports & Outdoors

In your case, anything that will solidly grip the exposed threads ?should? work.