BTW: these are just about the exact same thing, that is shown in your 2nd picture. As you would need to get the BNC to RCA adapters like is shown that picture also. Don't worry those are easy to find, as Radio Shack has them.
If they come pre-tinned (aka solder preapplied) then just touch the tip of your soldering iron to it and slide the wire in....hold for a sec then remove the iron and let the joint cool down. Repeat for next wire.
If they don't, then using your soldering iron touch the iron to each hole and then touch the solder to the end of each pin.....once the pin reaches the right temp the solder will flow into the pin's hole. (hold it too long and the plastic housing could start to melt though). Then do step above for pre-tinned pins.
A good read is the Elementary Electricians Handbook from Radio shack. or Google for Soldering Howto's.
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