I am continuing to work on the solution.
In order to be able into different slots, I have had to improvise on your suggestion.
For me, it's a case of trial and error, but I am making some progress.
But the good side is that I have improved other aspects along this new path.
I am learning as I go

I now have two paths one for saving for the initial scene and then a new path for the new scene.
The player has "do not destroy on load" so we take all of the elements with us to the new scene.
This is working so far until I restart from the first scene.
A bit more debugging and I think I will get it.
The new project represents only a plane for the ground, a capsule for the player and a simple cube for the save point.
The binary saving and loading is a prefab that can be added to the player, with the save point being a completely different entity but communicating with the binary saving and loading prefab.
You can add new save points at the present there are only two but do work.
Just select the save point prefab and place it within the scene.
Your suggestion helped me and I thank you for your time and help
