1. Backup the original files before making any changes.
2. Open the file widget-speakers.php
3. Find (at line 45)
echo ‘<a href=”‘ . get_permalink() . ‘”>’ . get_the_post_thumbnail( $post->ID, ‘sc_speakers_widget’ ) . ‘</a>’;
4. Replace this line with
echo ‘<a href=”‘ . get_permalink() . ‘” title=”‘ . get_the_title() . ‘”>’ . get_the_post_thumbnail( $post->ID, ‘sc_speakers_widget’ ) . ‘</a>’;
5. Update the file.