fuel pump prime lead ?

ive been reading alot and found out theres a fuel pump prime lead that is on the firewall and it bypasses all relays and stuff and was wondering if there is one on my 86 blazer s10 4x4 maybe if anyones got a pic thad be great but im assuming not haha what is the location of this lead if my trucks got it

thanks,
Evan

nvm i found it its on the firewall below the 12 v supply post by the a/c encasement

It should be tan and white single wire.
Best to catch the tan and white wire to fuel pump at relay or back to tank.
MT