Trish there is a base of a 14 guage copper wire at the back of the enamel and the prongs are in the front, they are just below the 'nest' wires right in the front. 

Are the prongs on the back holding the enamel secure?

Thank you Trish I have set the enamel with the help of tiny prongs that are hidden by the design element of the nest surrounding the panel. Thanks for featuring my work here Trish

I love the way you set this Nayna - could you tell us how you set the enamel in place?