Chase Pay Over Time - How Does it Work?

So I am currently seeing a pay over time offer of $0 fee for 24 months on a recent purchase I made,

I pay my CC off in full every month, but if I could spread the payments out on this big purchase over a bigger time frame it would really benefit me.

The question or concern I have is, when I go to pay off my CC every month (usually pay it off in blocks) - will it default to paying off the "Pay Over Time Balance" or will it take the (in this case $95 of the first payment I make apply it to that balance) and then apply the rest to my normal statement balance?

Anyone who has done this before and has some feedback, thank you in advance.