How to use Opensolr with Wordpress, WP-SOLR

After registering for your new opensolr account, go to add new index, and select a SOLR VERSION 5.1 server from our list.

Once you do that, simply download the zip configration archive and apply that to your opensolr index using the CONFIG FILES UPLOADER in your opensolr index control panel.
Please note that the zip archive contains a file called: schema.xml

Udating the schema.xml file in any SOLR Version, should also work.