Wires throught fire wall

The small details can cause much grief to the novice. Case in point...
Round harness connector at the instrument panel. That connector is keyed ( most are ) so they can go on only one way. The key in this round connector is commonly at the 12 o'clock position in the physical sense.
The ink and paper rendition of this connector may have the key rotated to another position ( 9 o'clock for example ). The positions of the drawn wires are also rotated accordingly so they remain relative to that key.
"It's 5 o'clock somewhere" ? Yep, where beer was used to put out the fire. LOL
Hope this helps