Bought a rear-fold tedder, have some questions

I did another equipment upgrade and bought a Kuhn GF5000T 4 basket horizontal fold tedder. It's an older machine but is in great shape for its age and has seen very little acreage for the last 13 years, and I got it for a good price.

 

There are two pins farther up the tongue, they look like three point hitch pins but are not. What are these for? (pictured)

 

Also, there is a lever/spring pin on all the wheels for the caster lock. But there is second lever with a cam on the front of each wheel too. What is this for? Adjust throw angle?

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Bought a rear-fold tedder, have some questions