Looking to make some penpals!

While others are stripping and making bobbers,
I want to add lights, a compressor, and a PA speaker onto my LT.

I've looked down into my electrical box a million times-

I REALLY NEED SOME HELP HOOKING STUFF UP!

I've got the Clyburn.  I'm at paralysis via analysis.

Installing a PA? Depending on whether you are running for public office, coordinating civil disobedience, herding cattle or calling in wildlife your amplifier needs may vary.

Can you get a little bit more specific with details of what you are trying to do? 

Are you building a police bike?  Are you a funeral escort?  That might define what you are trying to build.

Conspicuity/driving lights are pretty straightforward, the majority of brick riders have added them in various configurations. 

I have a compressor that I carry with me in the 22 liter top case.  It has a plug that lets me connect it to the bike's power outlet next to the ignition coils.

The PA speaker is an oddball, installation depends on how big it is, where you want to mount it, and what you are feeding it with.  Where is the PA/Radio?  What are you using it for?  I don't recall any brick riders installing one.

When using CB radio's back in the day more than half of them had a PA feature.

Welcome to this group source of great ideas as well as information for our legacy bikes!

I've owned my almost 300K Mile 1985 K100RT since new in 1985.  I've added lights and do still have my CB hooked up and is more in use occasionally than in the 80's and 90's.

Take a look at Drakes site at - https://www.kbikeparts.com/classickbikes.com/ckb.tech/ckb.tech.toc.htm#electrical

Up to 1985 drawing:

https://www.kbikeparts.com/classickbikes.com/ckb.tech/0.ckb.tech.files/kwiring/Early%20K75%20K100/K100.Wiring.85.Early(Color).jpg

Post 1985 Drawing:

https://www.kbikeparts.com/classickbikes.com/ckb.tech/0.ckb.tech.files/kwiring/K100/K100RS.RT.1986+.SLP(K100US_RS_85).V1.0.pdf

This guy has done us numerous favors and has great Ideas....

If your bike hasn't been too much modified (assuming that your not the original owner..  In the Relay Box there are unused connections for 1) Additional instruments, 2) Connection for heated handlebar grips, 3) Connection for Anti Theft with good 15 Amp Power off of Fuse 5 to Pin 30.

I work in the aviation field and have access to great electrical install tools and connectors...  You have to know what you are doing when you start adding additional non standard items to the electrical system on this bike...  if you do shabby work the bike will not like it.  

I've seen great K-Bikes literally being decommissioned due to fried wiring harnesses, or damage that the dealers had put so much time (money) in trying to troubleshoot problems that the owners had simply abandoned their bikes where the dealer then sends them out for "Salvage" i.e. Crushing.   
Spend a lot of time going over Drakes site and Good luck on your install!