Pennant at top or bottom ?

[macbeth]

My new to me used foresail is shorter than the forestay. (It was the closet used sail I could find to match the required dimensions) To avoid halyard wrap, should I place the pennant between the drum and the tack, or between the head and the swivel ? Or a bit of both ?

I'd prefer to put the pennant between the drum and the tack, so as to provide greater visibility forwards, but have seen it advised to put it between the head and the swivel. If so, why ??