Look at the servo monitor you will see at the bottom of each output a name. Write down the channel and the name under each.
Go into the Function menu you can call up each channel and change the name.
You will see channel 1 is the Elevator, so I used Channel 1 for my left elevator and channel 6 for right Elevator.
Then you can change the direction of travel if need. AFR is used to control the overall travel, endpoints handle the individual channel.

Make SURE they are BOTH called Elevator sometimes you have to scroll through the list. you DO NOT want "Elevator 2" for the second output.