I don't think the yellowish foam belongs there. IMO.
BTW, the horns went in without a hitch, and sound great! No more 'anemiahorn' sound. I followed the written directions and it was all quite easy. I highly recommend them. They cost $38 + wire and connectors, but after researching the used market online, it was well worth ending up with 2 brand new matched horns.
BBTW. Winterthur and the Hagley Museum are a great trip, and the West Chester KOA is a winner as well. The Hagley machine shop is a techie's dream, especially the 180 year old working machines!