Hi Tassie Dan,
That starter top is used for the recoil starter that bolts to the top of the cowl.
Image of recoil starter here
https://www.outdoorking-forum.com.au/forum/ubbthreads.php/topics/74594/Lawn_Patrol.htmlThe slot looks like you can use a rope for emergencies but it is a little low so would be a little difficult starting.
Image below of the original pulley (rope) start.
Cheers
Max.