who has warm water plumbed into the tray?

Location
denver
Who plumbed there bypass warm water into the tray? Do you just plug the front and run it into the tray? Can someone post a few pics?? Thx.
 
Location
uk
In the winter I run one pisser to the bars , drill and tap the bars block the ends and drill 3 holes in each handle .hot hand without pipes all over the bars to knock off . Second pisser to the tray next to the hood latch . Warm hands and feet lovely
 
Location
denver
so can i leave the front pisser alone and plumb the line that goes to the rear into the tray? also what size fitting do i need 3/8 or 1/2?
 
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