HP 9000/375 Added to the Collection

So, I picked up another old workstation, this time an HP 9000/375. I did a basic clean-up and test, and it does seem to work. With a reversed VGA-to-5BNC cable, I can see the diags run on the monitor. It has 8mb of RAM. So, questions, if anyone here has any knowledge about these beasts. 1) I have the HIL-PS/2 adapter (HP calls is the "keyboard adapter module"), but it doesn't plug in to the HIL port on the machine. There is a descending piece of plastic on the right side of the 10P10C connector that blocks it. I know that this adapter was made for the 9000/700 PA-RISC workstations, will it work with the 375, if I remove that tab? 2) What kind of memory do these machines take? I find reference to a 32mb kit (of 2 16mb modules) via HP part number 98229E. The specs say that this machine will take 128mb. So, should I just try to track down 4 kits? Any other advice would be welcome. This is my first 68k workstation, and I'm hoping to have more, in the future. Thanks! - Alex