Even though Day sees Templar symbols on panel 5, I see better candidates here.
The three arches can be either Ark Mariner or Red Cross, but Jeremy Cross also has a similar bridge in his The Templar’s Chart of Hieroglyphic Monitor (1821).
More curious I find this symbol (from the same book):
Also the Paschal Lamb is still a symbol in Templar Masonry today. Of course the examples are from much, much later than the creation of the Kirkwall Scroll, but I have to work with what I have.
