Extension cable to connect APC UPS to external battery pack?

[Anonymous user]

I work for a school. We have just purchased two of these APC uninterruptible power supplies:

APC Smart-UPS 3000VA XL- 2.7kW - 3000VA (part #: SUA3000XL)

and two of these external battery packs for extra backup:

APC Smart-UPS XL 48V Battery Pack - battery enclosure - lead acid (part #: SUA48XLBP)

The power supplies haven't shown up yet, but the external battery packs have. They are very big, and I realized today that our rack is too small to hold all of our servers, the power supplies, and the external batteries. To work around this, I'd like to rack-mount the power supplies and have the external battery packs sit next to the rack. To do this, though, it looks like we'd need some kind of extension cables to increase the length of the cables that connect the external batter packs to the power supplies.

I'd like to know what cables I'd need(Product numbers would be great), and what lengths are available.

Thanks very much.