Did I mess up in ordering the wrong attachments for our new dildo?

Hey everyone

I made a post in here a few weeks ago and went ahead and ordered an XS Jack Hunter without the Vac-U-Lock cut out. I realized that was likely a mistake and reached out to support to see if they can add that attachment. We use the Sportsheets Chantilly Lace Corset-Back Strap On Harness from Lovehoney, but I am not sure if the rings we have for this harness are going to be big enough for the dildo itself. We do like this harness and have used it with smaller dildos in the past no problems, but those all had suction cups. Do I need some kind of adaptor or way to keep this new dildo secure in the harness? Did I fuck up, or am I overthinking it?