Mercury serial number?

[Race8dad]

I've got an 04 pontoon with the original 04 mercury 75hp 4stroke engine. The serial number is missing from.the motor or at least its not on the transom mount where I believe it should be. Would It be somewhere else possibly? My new insurance company won't insure it without the number. What other options would I have? Thanks for any input

 

[flyingscott]

Look all around the swivel between the transom bolts