Workhorse ballast schematics

[TANGOMAN]

Is it just me or do the diagrams on Fulhams site not make sense. For example. I'm lookin' at the diagram to install 4, 40w NO lamps using a wh7 ballast. The ballast shows four red wires, one for each lamp. One wire to both pins on that same end of the lamp though... ? . The one yellow wire is shown connecting to the other end of the lamps, but again, to both pins on each lamp.
I can read the hydraulic schematics for an excavator but these diagrams are confirming my stupidity...
I've wired up PC's using wh 5's and wh7's. I ended up chuckin' the schematics and "wingin' it" untill they worked. That went well as I only busted one $ 50.oo bulb during a mild temper tantrum...