plastic domahicky with mono PMAX

[Dirk Grunwald]

When I assembled my mono PMAX w/TK50, I was left with a flag piece of
DEC-colored plastic that's about 8x10 inches with a little arrow at
one side and a slot at the back.

I can't for the life of me figure out where this goes. I've looked at
the manuals, but didn't catch it.

Anyone know what it's for?

Dirk ``clearing the office clutter'' Grunwald