That's an option. Some people do that and get on fine, 1 Quick link will be fine but a 2nd i think would add another weak point to the chain. Quick link are not as strong as proper links and can fail sometimes. I've witness both KMC and Sram links do it. So you kinda increase the chances of link failure the more you add. That's just my view. I suppose it all depends how much you trust those extra quick links. If you were to do it. I wouldn't join two together at the same spot if two were needed. I'd put them a good distance from each other.

Trouble is, quick links can be expensive when bought separately. It can be more economical to buy a chain that includes a quick link.