2 questions - "Run" only power source/fusible link install

You should be able to solder those links

The blue is "ign run" and feeds the coil ballast and the ign terminal of the regulator. THAT IS what you want for a choke.

HOWEVER, you should check it after you are done, for "voltage drop," because if it is suffering from drop, it will cause overcharging (too high voltage) from your alternator

To check for voltage drop to your regulator, Fire up and get the engine running (fast idle cam) to simulate "low to medium cruise."

Stick a voltmeter probe directly onto the ign terminal of your regulator, the other probe directly onto the battery positive post. You are looking for a very low reading, zero volts would be perfect. Anything over .2 (two tenths of a volt) is too much.

If so, you'll have to check the wire path from the ballast/ regulator -- through the bulkhead -- to the ign switch connector -- the switch contacts -- back out the switch connector -- through wireing -- back out the firewall connector on the battery feed -- to the starter relay stud.

Do the same thing for the ground path. Stab one probe directly onto the regulator mounting flange, the other probe directly onto the battery neg. post. Once again, over .2V is too much. If over this, improve the ground from the regulator to the battery.