Yeah it is the ATF cooling pipes to the mini radiator that sits in the front NS bumper..
As Pascs says: Run the engine until warm and on level ground. Leave in park and check the "hot" oil level.
If it's low then you have sourced your problem... Assumming that it hasn't been over filled previously that is!
Do not overfill.
Use dexron II ATF fluid to top up and use a clear tube attached to the end of the bottle and let gravity do its job... Topping up is aided by removing the plastic induction pipe from the air filter box, attached to the rubber bellows for the throttle body..
Now top up a little at a time with the ignition off through the ATF dipstick pipe...
Let it settle for a couple of minutes and start up, warm it and check the level again...
Repeat the process as needed until it's at the correct "hot" level.
Re-connect the induction hose properly.
If it was me... I would drain the box first and sort out the leaks... If its coming from the rubber pipes themselves, you can cut and patch them using small copper pipe sections and jubilee clips (it's not under a lot of pressure)... The ATF fluid should really be changed every 2 years or 24,000 miles anyway to keep it in perfect working order.
I do mine every year though.
3. 8 litres of dexron II from empty to full on a complete drain mate so if in doubt, buy two x 2ltr bottles and remove 200ml to be sure.
The drain plug is at the bottom of the gearbox