Help with Wiring for Temp Guage

[lgdpt]

I just purchased a bezel and guages from 72armyswbtruck.

My problem is, the previous owner put in an aftermarket temp guage with that heavy duty wire going into the engine block. Can anyone tell me how to convert my temp sending unit back to one that works with the original guages? Hopefully Im explaining myself.....

thanks for any help.

Travis