Fuel sender repair

Find a brass nail and cut the head off and solder it on. Make sure everything is clean and use flux. The old Accel solid wire kits had brass brads to hold the distributor terminals on.

Just ordered a sending unit, is there a way to fix this thing reading 1/4 tank problem before I put it in? I mean like will it hold if I go through all the trouble of soldering everything the way it is specified in the how to post?