"u guys are killing me with this positive ground stuff...yes. the truck is original (positive ground)."
Well, what does this refer to then???
"since truck is 6v "-" ground."
Ok, on to your question. The wire from the starter solenoid to the coil belongs in the trash. It will not work properly on this setup and is not required. If you are going to keep the original
6v "+" ground, LOL, then it needs to be wired up correctly as the original was. I would venture a guess that more than just the wiring was messed up on your truck. It may well be that the wrong coil is installed which might account for the jumper from the starter solenoid. Might want to start by determining what coil is installed.
The wiring on these cars/trucks are about a simple as it can get, just because someone messed it up doesn't reflect on the original design. I think you will be very pleased with the wiring back to the original configuration. You made a comment about an ignition switch, are you referring to the on/off switch or a key turn modern switch?
What you want to use for a wiring diagram is the 39 std (which is what a commercial vehicle should be). But if it has been converted to a voltage regulator (a very common modification in years past), then you will need to use the 39 dlx diagram. There really isn't that much difference in the wiring between the two.