Judgment / lion's mouth

Can we compare this capital from San Zoilo to Carrion's capital A? Does not appear to be biblical, shows a scene of men clasping hands, possibly making some sort of agreement... Senra argues that this a specific historical event involving Count Beltran formally appologizing and attoning for his and townspeople's rebellious behavior (though the image here do not match the historical event)

© Liz Lastra