Sorry to say, but my Corbin experience has been horrible.
Beautiful seat, comfortable and well made, but the mount pin was 1/2 inch off, forward or back, I forget...
Two returns to Corbin for rework and still off.
I had to make a mount myself using the pin from a spare seat.
If it's a solo seat, keep your fingers crossed and see if the pin aligns with the locking mechanism.
If not, you'll have to fabricate. Not an easy thing to describe.
The Corbin lock pin broke off the seat pan on on my last attempt to get it on.
I had to epoxy the hole flat, tap screw holes into the pan for the spare stock pin and shim it up with washers.
It's a half-**s repair but works till I can make a permanent mount bracket.