taxonomy config

<?php
function add_cat_meta_box($options){

    $tax_meta = array();
    $tax_meta[]   = array(
        'id'       => 'custom_taxonomy_options',
        'taxonomy' => 'doc-category', // category, post_tag or your custom taxonomy name
        // begin: fields
        'fields'   => array(
            // begin: a field
            array(
                'id'    => 'cat_image_id',
                'type'  => 'image',
                'title' => 'Text Field',
            ),
            // end: a field
        ),
    );

    return $tax_meta;



}

add_filter( 'cs_taxonomy_options', 'add_cat_meta_box' );