Emergency Lights

Aircraft just out of "C" check. A couple emergency lights inop.....

Dropped the overhead battery storage panel and just stared for a second.

Is that what I think it is????
  
     
     

The pins from the charger are supposed to go "in" the sockets on the battery...... not underneath them.

I'm not quite sure how the battery was even installed this way.

Wrong , but rather close looking battery was installed? Or were the pins bent as a result?

Bent down...... They had to be carefully straightened out (with power removed from charger).