Hi Jordan
Your truck has one more hole comin in from the engine compartment than I've seen before, wonder if it was drilled to replace a wire or possibly for a replacement temperature gauge tube.
Here is same area on my HUP
As you have discovered the only practical way to work on the dash and engine compartment wiring is with nose off. I make this comment to anyone planning to replace or do major work on the wiring in this area.
Jordan though I'll guess you have looked at the section on wiring on my web page, here is the link for people getting into wiring on thier CMPs
http://canadianmilitarypattern.com/C...formatioSn.htm I've included the link instead of posting over all the photos because you can punch down to much higher resolution than is practical on MLU.
Cheers Phil
PS In response to Davids comment on vacuum line, the vacuum line for the wipers on mine goes up through the center post on the windshield.