I bought a D. Carpenter electric wiper kit.
Mine did have an electric wiper originally and it used the two holes in the top middle of the dash for mounting.
The new wiper kit does not use these holes.
It bolts in the two wiper holes on the cowl and then there are two chrome brackets that bolt to the motor and go to the underside of the dash.
I made a bracket to hold a dual cone speaker and used the two holes in the top of the dash to mount the speaker bracket to.
It holds the speaker at an angle and allows room under it for the brand "X" AM/FM radio.