Does anyone know where this brake band adjustment is done ?

I can find details on the RE4R03A like this:

http://www.transgear.co.nz/Transmiss...djustment.html

RL4R01A / RE4R01A / RE4R03A / JR403E

Front band

Tighten 50in lbs back off 2 1/2 turns
But am unsure of where this is done.

Also does anyone know the effects of a little more or a little less in adjustment ?

This image gives some ideas where it is, is it a bolt on the outer casing ? If so where ?