Applying for a Spain visa from the uk

[mufas12]

I was about to fill in the Spain application for a national visa. But what I don’t understand is it asks for my Spain resident address. I was going to apply for a visa and if I get accepted then start renting a property. Does this mean I rent a property before it could be approved? Or would I have to rent that property and stay in Spain within the 90 days of not needing a visa while waiting for it to approve https://speedtest.vet/ https://vidmate.bid/ ?