Mth Norfolk southern F7 ABBA PS3 locomotive set

Flip the switch on the trailing unit back to forward. The switch to have the locomotive start in forward or reverse is intended for conventional running.

Do I need to set up as a lash up? And how about the head light switch should I keep that so the headlight on the trailing unit head light only comes on when in reverse?

An update- I added both locomotives to my DCS app on my tablet. I did a lash up but I cannot get all the features. For example the crossing horn and few others. So I tried just adding the locomotives as one and it did work but gets werid when I run them. Like the lights don’t work and the trailing locomotive ditch lights stay on while going forward. If anyone has and helpful information please. Thank you