Lose the stomp pads you girly girl! lol
Anyway, I ride a fair bit of t-bars and platter lifts (I think they're called something else in your part of the world).
It's all about being comfortable, I wouldn't say there's a "best position" for all to follow. I probably tend to have my foot up close to my front foot. Makes standing feel a little more natural, and the tail of the board just drags behind me.
I wouldn't over think it, just try different things and do what you like!
Oh and stomp pads are overrated. About 5-6 years ago my stomp pad fell off my old board. I went to buy a new one and my buddy said "What for? You don't need it..." so I tried without and wallah, I'm still here to talk about it.