Anyone know what connector this is?

Google Image search has failed me. This is a UPS battery connector. They no longer sell the replacement batteries with this connector, just a pack of 12v9a batteries. This unit does not have batteries, so I can’t pull the connector off the old battery pack.

Just trying to find it to buy it so I can wire up the new batteries without destroying the UPS side.

Looks like an Eaton/Lenovo battery connector. I think they are EC type. Maybe this site will help you: Exploring LiPo Battery Connector Types | Grepow. Here is a picture of one from my backup Lenovo battery pack.

That is amazing! Thanks for the help. Lenovo has UPS too? So does everyone just rebrand APC/Eaton?

For “enterprise” models, I suggest that this is the case. I have two UPSes, one a Lenovo Lenovo RT1.5KVA and the other an Eaton 5PX. They both use similar batteries (and connectors) and network monitoring cards are both Eaton but the Lenovo uses firmware branded “Lenovo”.