Here’s the short strip for students, back side. I partially stripped a gap in the power leads to solder the cap on, the signal resistor is heat-shrinked into the data line with a coffee stirrer for strain relief. Sorry, I couldn’t find a good way to add this to the first post. Rustoleum LeakSeal is a good, clear sealant for lit areas, and liquid tape for the more needy mechanical strain areas. Thanks for the previous suggestions and kind words!
Would you recommend LeakSeal over silicone sealant?
No, it makes a poor bond to the silicon jacket, and it dries down to a very thin layer, so it doesn’t make a good ‘plug’. My main objective was preventing shorts from foreign objects touching the leads.