QD, if you are using a civic trans go with the civic cable. Is it a 1st or a 2nd gen Civic trans? I don't know anything about the 2nd. gen transmissions, but as long as the cable matches the trans you should be good. I think they all attach to the speedo the same way.

The tach is electrical and you should hook the blue wire to the negative post of the coil. Thats all I had to do when I installed one on my 1200 anyway. Does your Accord engine have points, or electronic ignition?