Tachometer install.

[81GMCSierra1500]

Hi all,

I've got almost all the way done on a tach install that should've taken about half an hour... I am curious how I go about putting the tach signal wire (green wire) into the "tach" port on the distributor... Also, how would I be able to reach the distributor without drilling a hole in my firewall? I wanted this to be easier than it is proving to be...