Hello JimBo,
.
Neat instruction sheet!
.
I've got mid-80s Shimano 600EX platforms with toe clips and
straps but they all have those "wings" the triangular plate
that bolts down over the clips... OR... act as the front
fixture for securing Shimano 3-bolt cleats, which have a
slot towards the rear that locks down onto the edge of the
platform body's face plate.
.
The cleats in your pics look similar but not quite the same
as my cleats. I wonder if mine were an earlier version?
.
In any case, the basics of your instruction sheet would apply
to installation of my cleats too. I haven't tried them yet
but may do so on one set of pedals to see what they're like.
.
So thanks for the instruction sheet.
.