71 B-Body wiring harness routing question

[rrTor-Red]

Sorry if this is the wrong place to post here but since my car is a 71, figure WTH. Does anyone have pictures of how the harness is routed? My main thing is on my new harness, it has plastic rectangles and am wondering how they are installed, secured to the firewall.

Do these plastic thingys mount to anything?

 

[wahya]

I didn't have any rectangular straps. There were holes in the firewall and inner fenders for these.

 

[rrTor-Red]

Thanks! That helps!