This will be kind of a long post so my apologies up front.
I finished added LED's to the topbox and it came out nice. This is an easy mod to any topbox for any topcase/topbox for roughly $13 dollars and some of my time.
Here's the parts that I ordered off of fleabay:
Jumper cables $3.40 U.S. TMD and waterproof flexible LED strip $9.21 U.S. TMD
http://www.ebay.com/itm/181846678573?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIThttp://www.ebay.com/itm/321145960519?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AITI first disassembled the topbox to get at the lenses. Note: There's only Scotch tape holding in the existing LED strip that came with the Bestem 929. There's 3 grooves in this lens and made it quite nice to have 3 rows of LED's.
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loginI used some Gorilla tape (kind of HD duct tape) and cut a strip to secure the exiting LED strip.
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loginMeasure and cut the LED strip at the indicated cut lines. It's super flexible and had adhesive on the back which wouldn't be a help in this case. Pro-tip: These are tiny solder points and to inspect if you have a smart phone, go to camera mode and just zoom in to get a magnified view of your work. I used the jumper wires and just carved them up in the colors that I need to be consistent with the OEM colors.
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loginSolder on two leads after you strip the silicone away from the end with a razor blade.
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loginHook it up to any 12V power source to check your connections.
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loginI laid in the LED strips in all 3 of the grooves and taped them in with the Gorilla Tape.
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loginI also ran a short LED strip to the dedicated brake light on the top of the topcase and just patched it to the existing wires for those LED's.
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loginWire it up to the pre-existing wiring that came with the case and you're good to go. Please note that LED's are polarity sensitive so double check your pluses + and minuses -.
Running lights
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loginBrake applied. Note: I now have three tiered lighting for brakes; Honda brake, center row on top box, and a row at the top of the box.
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loginOne last thought, I ran the LED strips all the way around the lens and have 180* visibility now.
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loginI hope this post inspires someone to add some decent lighting to their existing topcase.
Again sorry for the long post.
Mea Culpa