Unscrew the nut to slacken the cable.
There is the TPS (throttle position sensor), map sensor and iacv connector.
You need to cut a slot in the screws to be able to remove the iacv
It's fine to keep the batt disconnected. Jap or VAG.
It's a pain getting the screws out but once out its easy b
To adjust the cable, tighten the bit that secures the cable to the TB
As for the sensor. It's not a sensor. It's a valve. See here....
http://type-r-owners.co.uk/forums/showthread.php?t=87123