Test, then glue
Be sure to test BEFORE you glue. Use your multimeter. (I don't

, but I am telling you the RIGHT way)
Put all parts into their proper place, with wires arranged the way you want them permanently. Apply epoxy - I used a toothpick for this as the space is quite small and I didn't want epoxy in the wrong places (I accidentally epoxied my atomizer in the first one).
Be patient. Wait at least 20 minutes for the epoxy to set up before trying to vape. Moving the parts before the epoxy is set enough will weaken the joint.
Insert battery and vape out.
(in case you are wondering why I stress testing with multimeter, I tested mine with a battery and an atomizer before gluing. After the epoxy had set, I put the battery and atomizer back in and tried to vape - my battery got hot real quick and the atty did not - I had a short that didn't show up until everything was glued in place

. Now I have to disassemble my mod and fix it. I hate re-doing what I already did

)