Set node position in Cytoscape.js

I am using the excellent Cytoscape.js for graphing.

I have previously been using the Cola option for this as it uses force direction.

However I now want to visualize multiple graphs that have no connections and realize that fCose is much better at doing this.

The problem I am now faced with is I am now unable to set node positions when I already have coordinates to do so.

I was able to achive this using Cola by doing the following in the layout options -

    name: 'cola',
    padding: layoutPadding,
    nodeSpacing: 40,
    edgeLengthVal: 20,
    animate: false,              // setting this to false
    randomize: false,            // and this to false allowed me to manually set the node position coordinates
    maxSimulationTime: maxLayoutDuration,
    boundingBox: { 
        x1: 0,
        y1: 0,
        x2: 10000,
        y2: 10000
    },
    edgeLength: function (e) {
        let w = e.data('weight');
        return w;
    }

Also in the defaults of Colapositions is set to undefined, which I assume means that if coordinates are passed in they will be set accordingly.

However my problem is in fCose is, no matter what I do, when passing the coordinates of the nodes in it is having zero affect when rendered.

In the defaults of fCose I see three variables I thought if I altered would have an effect -

    quality: "default",
    // Use random node positions at beginning of layout
    // if this is set to false, then quality option must be "proof"
    randomize: true,
    // Whether or not to animate the layout
    animate: true,

So I set quality to "proof" and both randomize and animate to false.

I also tried adding positions: undefined, however none of the above changes had any affect on the node positioning. How can I achive this with fCose?