GE Monogram ZUG30 Installation Instructions Manual page 5

Fasten heater leads to open slot in vent cover, using the strain relief provided with the kit.
Vent cover
Strain relief
Heater leads
Locate the vertical, metal plate behind the vent cover. There are two holes in the plate for mounting the transformer.
Locate the transformer on the plate and attach using bolts, nuts and washers supplied.
Transformer
Metal plate
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