What battery are you using or do you plan to use?
Four-pin XLR female connectors are typically sold bare, then one solders the wires to the connector as suitable for the application.
If you plan to use your old battery, or replace it with the same setup, you should check the existing male XLR coming from the battery to determine which pins are (+) and (-), solder the female pins accordingly, and finally solder the V3 connector correctly.
Seems like 4-pin XLRs were used mainly for SLA (sealed lead acid) batteries going back many years. There are powerful, lighter weight options available now. For example, many people are powering their V3s (and other devices) using li-ion batteries marketed for portable DVD players. They're sometimes referred to here as "Walmart" or "Wally" batteries, since many people originally purchased them from Walmart.
One example of this type of battery:
http://www.walmart.com/ip/Ultralast-Lithium-Ion-Universal-Portable-DVD-Player-Replacement-Battery/9863775And they can be had on eBay or under other branding for less than half the price in the link above.