Are you planning on hot smoking the sausages or going for a long slow smoke/cook? Your question sounds more to me that you're thinking about putting Cure #1 into a fresh sausage (one that is hot smoked at 225 or so) rather than something you low smoke for 4+ hours?
If that's the case, then fresh sausage doesn't require any cure if it's cooked to a proper IT within 4 hours. Now, if you're looking at smoking at 100 and then up to IT much slower (like summer sausage), then Cure #1 should be used and that's what's likely in your jerky kit.
I don't mean to second guess, I just want to make sure you're adding the Cure correctly. Sausage is loads of fun...enjoy!!