VCCA Home Forums TECHNICAL - GENERAL Radios, Tools, Accessories Deluxe horn ring 59-60 Fullsize

I have the deluxe horn ring 763178 which has the oblong cover over it. It is for the 59-60 fullsize cars. It is also for the 60-65 Chevy trucks-optional. (In 66 they went to a round horn button cover, similar to a 63 Impala style.) My question is, where can I find a schematic for this particular horn/wheel setup? I have one for 55-56 3-spoke wheel but the schematic is not exactly for my horn.
Eckler's sells a couple of different kits for these horn rings, but I am unsure of which to purchase. It appears that all I will need is the small plastic "ring" to complete my setup, but I'd like to have more info before I proceed. Thanks for any info.