The incense was probably next to the loaves, rather than directly on the loaves. Alternate translation: "You must put pure incense next to the loaves in each row" (See: [[rc://en/ta/man/jit/figs-explicit]])
What the incense would represent can be stated clearly. Alternate translation: "to represent the loaves as an offering" or "to be an offering that represents the loaves" (See: [[rc://en/ta/man/jit/figs-explicit]])