Hi All. I'm only a minor holder here, but I do believe in...

Hi All. I'm only a minor holder here, but I do believe in what this company can achieve. I'd like to participate in the SPP, even though I could buy on market today for essentially the same price. My problem is that I'm completely new to the SP process!
I've received the application form in the mail, but I just wanted to double check how it works.
If I use the BPay option to purchase a package of shares, will it automatically link them back to my HIN? This is what I think the form is trying to tell me, but I was hoping someone could confirm this?
Just to be clear, I'm not chasing any financial advice, just wanting confirmation on how the purchase process works.
I plan to wait until next week, then, short of any obvious train crashes on the market, I'll pull the trigger on this.

Apologies in advance for what might seem a silly question.

Cheers and GLTAH