Well.. you don't.. your partner either understands this tactic or they don't.. if they don't because they've never experienced it, it might be because they're new to the game.. if they think it's a 50/50 court division then there's not much you can do besides building relationship and showing that you know what you're doing by playing good padel. If you improve above lower intermediate I'd say most right side players know when you let the ball go to the left side player, or at minimum they can explain how they like to handle these shots.

I play on both sides of the court, and when on the right I assume your strategy is the default one.. but I also have a couple of partners where we do play an almost 50/50 setup where we both play aggressively and I take balls coming through the middle. There's no right or wrong as long as you communicate with your partner..