Trailer fitting a E23 MKII Shoal Keel

Can anyone tell me how my E23 MKII Shoal Keel (swing keel) boat is supposed to sit on the trailer?
Is it supposed to sit directly on the shoal keel (the struct surrounding the swing keel when it it's in the up position) with rollers or bunks basically keeping the boat up right.

I did a test fitting with my new trailer this weekend and it's not bad but since I really don't know how the boat is intended to sit on a trailer I'm not sure what is correct.
Here is a link to some photo's from the test fitting https://www.icloud.com/sharedalbum/#B0XGWZuqDGlrzNX

Thanks for any input.
Matt S.

Different Boat Same Issue

Greetings, Not sure with the Ericson... But I once had a Venture 22 with a swing keel. (400 pounds of cast iron)
She sat on two carpeted trail boards that look like 2x12s. The swing keel had it own cradle beneath the bunk boards that would carry they weight keel... after you lowered the keel into it once you were out of the water.

Rick