pardon the phrasing but this helps me to this day!
"dick down, orange to brown"
for an rj45 ethernet cable:
with the pins facing up it is
orange white orange green white blue blue white green brown white brown>
for B which is usually what we see out in the field
edit:
can't figure out how to keep it in list format on the phone
i was like you for years. YEARS!
newpipe (or some other front end) saved me from missing absolutely everything