wiring diagram for 98 and new harnesses

hey there, im connecting a 99 civic head unit to the teg, and i bought the proper harness to connect to ours and a metra one to connect to the civic headunit. i have a wiring diagram for the two radios, and everything is right with the one for my 92 teg. however, the diagram i have for the metra harness into the 99 civic deck is totally different than all the codes for the wires on the actual harness i have. should i not worry and just match the colours/descriptions on the wires, or have i got the wrong harness? anyone know where i can look at the wiring diagram for the 99 civic maybe ive got a bad copy… thanks and sorry for the long post!