Zone Control panel needs to be mounted!
This is a 40 VA transformer and the line voltage wires (BLK & White) go inside of the unit.The unused orange wire appears to be for a 240 Volt primary use. The transformer should have been mounted and secured with the line voltage wires in a box. The control wires can be outside the unit. The transformer can also be mounted outside the unit so long as it is secured. They used the wrong style of transformer, They should have used a box mount 40 VA transformer and installed another box on top of this unit. Just poor workmanship !

Dan Hagman
Hagman Heating and Cooling (Rheem Dealer)
Altoona, Iowa
NOW
ProSite Home Inspections