Solaredge power optimizer placement

I had a ground mount installion in March and question the placement of the optimizers on the snapnlock frame. All optimizers were mounted with the heat sink towards the panel. (Same plane) All roof mount installation videos I’ve seen from solaredge and others have the heat sinks facing away from the panel. The few ground mount installations I’ve managed to see on youtube have the optimizers facing away from the panel. This makes sense to me since the panel is a heat source on hot sunny days. Would anyone else with a ground mount post what position your optimizers were placed, please? Thanks!

shown how to in this video https://youtu.be/ECjMPPLSmC8