Changing the default GeoNetwork Map Viewer basemap (OSM) Center

By default, GeoNetwork Map Viewer renders the base OSM map at center 0 with zoom 2. I would like to change the center to a different point (like Paris) with a zoom of 6.

How to accomplish it by changing the 3.8.1 geonetwork core source directly?

From mapsManager.js, I tried changing center and zoom to different value under:

createMap: function(type) {
          var config = gnMap.getMapConfig()['map-' + type];
          var map = new ol.Map({
            layers: [],
            view: new ol.View({
              center: [0, 0],
              projection: gnMap.getMapConfig().projection,
              zoom: 2
            }),

I rebuilt the war and deployed it to app server, but it does not seem working.

Also saw the post on:
Focusing GeoNetwork default map on Canada?. But not clear what exactly change to the config-viewer.xml

Any insights?

//comment out the viewerMap, define it explicitly using the customized maps config
//var viewerMap = gnMapsManager.createMap(gnMapsManager.VIEWER_MAP);
var mapsConfig = {
    center: [-39813045, 6213440],
    zoom: 4
};

var viewerMap = new ol.Map({
    controls: [],
    view: new ol.View(mapsConfig)
});