conductor heads and brackets

<use xlink:href="/assets-global/icons/svg-sprite.svg?v=2020-11-25-201508-8d7f546-017871#ico_plus"> <use xlink:href="/assets-global/icons/svg-sprite.svg?v=2020-11-25-201508-8d7f546-017871#ico_minus">

<use xlink:href="/assets-global/icons/svg-sprite.svg?v=2020-11-25-201508-8d7f546-017871#ico_plus"> <use xlink:href="/assets-global/icons/svg-sprite.svg?v=2020-11-25-201508-8d7f546-017871#ico_minus">

<use xlink:href="/assets-global/icons/svg-sprite.svg?v=2020-11-25-201508-8d7f546-017871#ico_plus"> <use xlink:href="/assets-global/icons/svg-sprite.svg?v=2020-11-25-201508-8d7f546-017871#ico_minus">

<use xlink:href="/assets-global/icons/svg-sprite.svg?v=2020-11-25-201508-8d7f546-017871#ico_plus"> <use xlink:href="/assets-global/icons/svg-sprite.svg?v=2020-11-25-201508-8d7f546-017871#ico_minus">

<use xlink:href="/assets-global/icons/svg-sprite.svg?v=2020-11-25-201508-8d7f546-017871#ico_plus"> <use xlink:href="/assets-global/icons/svg-sprite.svg?v=2020-11-25-201508-8d7f546-017871#ico_minus">