The bussbars will conduct lots and lots of amps while totally protecting the LEDs. A bit of snipping will be required to remove the short circuits while leaving enough leg to terminate to.
If you don't know which way to connect a LED from a batch like this, just take two, connect them in parallel with one facing one way and one the other, take a guess at a ballast resistor value (say, 220 ohms for a 6 volt receiver battery) and connect to a battery of 3 volts or more. One of them will light up. Note which end of the lit up one is connected to the positive pole of the battery, use that for the rest.