help with where a few things go since bought bike in parts im still lost like negative on battery?

have no idea where this stuff goes or how if anyone has pictures
bought bike in pieces with bags of index cards saying stuff so iv made it good this far but there are a few unknown plus its been hard. its 79 year

1. negative wire on battery? without starter. kick only. i figure anywhere on motor or frame good? but where is original spot? is original on starter? dont know if bikes making me worst or better electrician. also where does black ground go the small one coming off harness?
2. break light thing where it mounts exactly

 

thx a bunch. by break thing i mean little pull light sensor thing. its mount came in nag with right engine mount bracket n delema is does it go on top or bottom screw? ill probally be able to tell better once my break is back on but any pic would be appreciated.
as for ground i have ground on case bolt where blowback box is so close by the other ground on frame screw. i think battery box might be a bit different as for 79 but most looks same.
right now i have no spark... i got new battery so maybe it needs charge im hoping thats it. my multimeter broke so ordered new one so maybe then ill know more.
im missing something that has 6 prongs n im pretty sure its not ignition box since on points 79. maybe is some flasher or ignition control? ill try in take pic of harness where im missing a component tomorrow when not rainy so much. iv studied wiring diagram n its a bit confusing as the 79 n 82 are different by points n tci. i take it i still need a battery to crank this or is there a diagram for no battery? i got kickstart only do you think its not kicking hard enough to do spark? anyhow this bike taking forever to fix. i recently sanded n painted frame copper so thats what iv done but put bike together n no spark so bummed. i might just try pay someone if it does come around soon

 

ok i figured 6 prong out n now have spark. i had to put my handle bars on and 6 prong was on there as well as run switch. im thinking it was run switch not hooked up. thanks for above picture but i cant tell if bracket is on witch screw as there are two right there. it looks like your mounts welded? mine is either screwed up to one of the back right engine mounts bolts just witch bolt. i think it might just be obvious once i get break on there. anyhow this is special help so thanks so much. i gotta go buy oil next.