Dashlet for Compose Email view

Dear SugarClub users. 

I'm using SugarCRM Version 11.0.3 (Build 292 P) (Q2 2021) on Prem.

I have created some simple Dashlets that hold static HTML text. These appear when a Quote is being created or edited. 

I have been able to add a similar dashlet to the Email List and Email Record view, but I would like to add a similar Dashlet to the Compose Email view. i.e. when you select Email | Compose (As in #1 Below)

I would like to add it the Dashlet area of the Email Compose view. (as in #2 below)

For the Email record and list view I have added the relevant Dashlet files to the "./custom/clients/base/views/email-dashlet" directory. i.e.:

• email-dashlet.hbs
• email-dashlet.js
• email-dashlet.php

With the following setting in the email-dashlet.php file. 

<?php

$viewdefs['base']['view']['email-dashlet'] = array(
    'dashlets' => array(
 array(
    'label' => 'Email Dashlet',
    'description' => 'Description',
    'config' => array(
                ),
    'preview' => array(
                ),
    'filter' => array(
                'module' => array(
                    'Emails'
                ),
            ),
        ),
    ),
);

This allows me to add the Dashlet to the Email Record and List view. 

Is there a different way to add this to the Compose view of an email? Thanks for your assistance.