I had already made a pseudo-compartment for a mock flamethrower on top of my left armpiece. See?
I popped off the back casing of the candle with my knife. Then I cut off the stupid fake-flame covering the L.E.D. I pulled all of the guts out of the casing and threw it away. I finally chopped the sides and all the other bumps that were sticking out until it would fit into the flamethrower chamber. I taped the battery cover on and inserted the piece switch-side up, of course.