1990 model wiring connector style?

I am going this weekend to pick up a 1990 model M-22.  Can someone tell me what style of connector was used in 1990 for the towing electric signals?

6-way round pins, 7-way blade pins, flat?

Thank you!

[oilspot]

Most likely the 7-way blade.

And as I found out... the pin-arrangement is pretty standardized  (Thank goodness).

The center pin is an aux, which for us (TM) is back-up lights.