If you have not done this before related to another Honda, I advise you to
take it to one of those stores that specializes in selling radio systems
for cars. Those people that work in those shops do this type of work
hundreds of times per month on all types of cars. It's easy for them since
they have encountered every problem that could come up. It's very
frustrating to take everything apart related to the radio system and not
be able to reinstall it exactly the way that you intended. Been there and
done that. Perhaps another poster can recommed a store that sells after
market car radio systems.