Decal question on ECU

Picture below is of a ECU decal I recently bought on line and 2 ecu I purchased from #halifaxhops.
On my 72’ 340 Demon which side does the decal go?
On the face side where the plug is on the left or the side the plug is on the right.

My memory says the plug on the left. Decal is facing the engine. Currently mine is aftermarket. Does anyone have a photo of a factory ecu and decal placement? My FSM only shows a loose ecu.
Thanks,
Syleng1

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