I added the mod on my existing save, but i dont see any of those gold chests on the screenshots ?
How do i sell and buy from chest?

you gotta buy them

how are the called ? i dont find them

do i need to research ?

http://prntscr.com/r9t5nu

no gui

http://prntscr.com/r9t871

i think they are in logistics when you open the buying menu

yes but there is no such menu on any chest

ok i found them

thanks for help :) http://prntscr.com/r9te1t

i cant buy, when i click it says bought 0 http://prntscr.com/r9tei2

edit: seems i didnt had money to buy, i sold some stone and now it works

it costs 500+

works great, thank you for help :)