Deciding WHERE to place the key light is always up to the photographer. In the example photo, the key light lights up his right cheek quite a bit, and creates a strong shadow to the side of his cheek/outer lip area: I personally do not find that especially flattering.
The tricky thing when using raw, unmodified speedlight lighting is that the light is HARD, and at close range, it has a LOT of fall-off in a very short distance; if it is moved back to 7 to 10 feet, the light becomes more-even, not so fast a rate of fall-off.
It's not 100% clear what the desired lighting effect is supposed to be. You have two sources as well, competing for attention, one on the left, the other on the right.
I dunno...I think these need to be shot, looked at, learned from, repeated, and so on...every set-up is a little bit different from the one that comes before or after it...there's plenty to be learned from these kinds of shots, but it's tough to offer valid, meaningful advice when we're not 100% sure what **your** intentions are in a lighting set-up.
My opinion is to just shoot these, look at 'em, see what you think. After a bit, you will learn what does what, how that looks, and so on. learning how to light things like this, is "a process", as coach Nick Saban says!