New charger question

[Cobra,1]

Currently have a 2012 txt 48 volt with delta q charger (black and yellow) from factory as on board charger.

Also found what I think is a deal on a new charger. Problem is new charger a ROHS model DLDZ 48v 18 amp I can find no manual for. It has cooling fan,digital read out for volts and amps. Looks like a quality charger.

It only has two wires on dc output + - but on board delta has a 3 wire plug with a three terminal adapter plug coming out of charger connecting to harness from there to battery terminals.

Any info on this brand/ model of charger out there.
Aside from just connecting it’ s dc output negative and positive leads to pack voltage batteries.
Any other options for on board install?

At this point bought it as a spare for $50.00 so hopping made a good choice🤔