Old Uninterruptable Power Supply (UPS) (Gould's Ground BA11)

Hi ,
I have an old UPS that had stopped working a while ago, so was replaced with a new unit. There are No batteries, and im not sure if that it is a battery problem that caused the issue.
Details:
Trust 1500 and the batteries required are
Lucas LSLA7-12 12V 7Ah Rechargeable Battery (AKA Yuasa NP7-12)
no cables, but might be handy for some one to troubleshoot if you are that way inclined