Factory second battery?

[jwsutherland]

My 98 Chev 2500 Burb has factory 2nd tray with small connector near it. Bummer orig owner didnt finish. Anyone know of a possible matching harness for it? Maybe GM part ##?
Thx JW

 

[zora]

Not sure exactly what you are looking for but can you spot it at www.gmpartsdirect.com