The E-Maxx has a pillowball suspension, so you can adjust camber by adjusting the pillowballs on the ends of the suspension arms (they're inside the hubs). For example, if you wanted more negative camber, screw in the upper pillowball a bit and let out the lower one a bit. Use the hex wrench that came with the kit, if you have it.
Of course, be sure you check that you're not binding or haven't let the pillowball out too much.
Tamiya TB-Evolution V & TA05-R | Kyosho Ultima SC & RB5 | Associated FT RC18T