A good antenna connection need to be strong and electrically good, on radio application this a way to give a good dx results
Step 1: Strip the Jacket
Put your PL parallel to coax and strip the coax jacket from 1/2 screw back on the connector in to end tip of the PL259. Take care not cut the shield copper.
Step 2: Pre-solder the Shield
See the little holes on the connector, pre solder from 1/4 inch back of the holes to end of the dielectric on the connector
Step 3: Strip a Center Element
With a knife cut the shield and the coax dielectric until central element, take care not cut or damage a central wire and remove all copper between shield and center
Step 4: Screw the PL259
Screw the PL259 to coax the PVC jacket give a support, screw hard until shiel stop on dielectric, check you can see the pre soldered shield thru holes and measure not have a short between tip and ring or body on the connector.
Tip: remember before come in the PL ring over the coax cable
Step 5: Solder and Finish
With a pre soldered shield you need a less heat on the connector body, when all is heat solder each little hole, and end on the tip. Not put much core rosin solder.
Now you have a great PL Installation, take care use a good quality connector