Interesting. These 180-Watt PowerHouseâ„¢ Power Supply SKU: 6-22983 bricks came with the ZW-C set catalogued in 2001. I have a triangle driver and that type won't work. The screw head I'm seeing definitely requires a spanner driver similar to below illustration.
These are the 180 watt bricks that required the Phase Adapter (see attached pdf).
Long shank spanner screwdriver sets are available and that may be my solution.