Bottle conditioning Question

I’m going to put Candi syrup and yeast into a keg, purge it, then rack a BDS into it.  Then from the keg I will fill Belgian bottles and cork them.

My question is about the amount of yeast to use.  I used Mangrove Jack’s M31 for the beer.  Can I just dump another packet of M31 into the keg with the Candi syrup or do I have to measure it for some reason?

You probably only need to use half of a packet.