the photos look good. Nice start.
It is possible to add a second flash to V2 but not so straight forward. This is one of the reasons I went to V3 instead of V2.xx
To add a second flash, duplicate the circuit used for flash1. Connect to a spare pin (A2/D16, A3/D17, A4/D18). Add the code to set up the flash2 reference and the code to trigger it.
Search the sketches for FT1. This will show you all the places you need to add FT2. There a quite a few places you need to add code (dropController_2019_V2_001, makeDrops, parseDropData, processNewData) and I suspect it will take a while to get it working.
In the apps, you would need to select V3 so the extended controls become available.