Check copper connections at end of strip (if missing)
Cut back one (1) contact link, usually about an inch (it will make the strip shorter, but it is still usable if desired)
Remove silicone from the end of the LED strip, exposing copper contacts (be careful not to cut through or cutoff)
Identify the Positive (+) and Negative (-) side of the strips copper contacts
Prep contacts (clean and use a small amount of flux and solder on each contact) next
Prep wire leads before soldering (strip insulation about ¼” then use flux on wire ends, pre-solder wire )
Soldier leads onto strips (Red on Positive and Black on Negative) Remember LED light strips are polarity sensitive and have to be correct to illuminate or light up.
Test the strip to make sure it Illuminates (9 volt battery works perfect for this test)
Slip heat shrink tubing over the contacts and leads (2ply self-adhesive heat shrink tubing recommended)
Use heat gun to shrink and seal ends (make sure the heat shrink tubing is long enough to properly seal the strip and leads)
The strip is ready for use
Hint: Always use Flux when soldering
Note: The LED light strips are polarity sensitive and must be connected Red leads to Positive (+) and Black leads to Negative (-) and always install a in-line fuse (Max 5 amp) for best protection capabilities. In some cases you can use an existing circuit that already has current protection, just be a aware of the amp load on a given circuit.