Need LED for Trickle Charge

I am building a Gel Cell charger using the circuit in the link below for the Maxim 712 IC. It has a LED for power and a LED for full charging mode, but I would like to have a 3rd LED showing when the IC is in trickle mode. Can someone show me where to put the trickle mode LED? Thanks.
https://www.electro-tech-online.com/custompdfs/2009/05/Gel_Cell_Batteries.pdf

Isn't the LED you want just the inverse of the "FAST CHARGING" LED?

Just connect it across the output lines going to the battery. When the circuit is charging all three would be on. When its trickling only the power and the trickle would be on.
It would also work as a battery connected sensor too. Use different colored LED's so you know whats going on from a distance.