There is an available design choice to use a super capacitor. Instead of a battery. It negates any issue with battery connectors entirely and would fit in the same space as the socket. But of course it costs a little more. I am considering trying it out on my board that has connector broken off.
If a battery is used the design choice should select a connector that is commonly available eg JST-2 and not this brand X 1.0 2P thing from China that’s hard to find. It would make little difference to board real estate and the larger connector is more robust.