Curing butternut squash

I need advice. I thought I needed to cure my butternut for a few weeks in a warm place, then store in a makeshift cold storage place. That worked last year. This year I have them in my attic to cure, but it’s cold, not warm. Should I bring them into the house for a few weeks where is warmer. I want them to last to the new year.

Thanks!

What is the humidity level in the attic vs inside the house?

I do not know what the humidity level is. My humidifier is at 30% I think and maybe some will go up to the attic. Or seep to the ingested back hall. Cool in the attic. I could bring them into the heated house too. Thanks!