I'm not sure what kind of soil you have, but from my experience you may have difficulty "pulling" stumps from the ground with a compact tractor. You may be able to dig around them with the FEL enough to get them out eventually but you will disturb a lot of dirt to accomplish that using a FEL. Typically, you would use a backhoe to dig them out. For what it's worth, I owned a Case 450C dozer for several years, and I didn't even use it to "pull" stumps out of the ground. I removed a lot of stumps with the blade by digging around the roots and pushing them out. Even that was sometimes a challenge depending on the soil and the type of tree or the amount of leverage you could get. In my experience, it was easier to push out an entire tree than it was to dig out a stump. Keep in mind that the dozer would outweigh most compact tractors by several thousand pounds. I think you will just spin the tires or stall the tractor, but I am certainly not an expert. You might consider an alternate method.
Regarding where to attach the chain, do a search in the forums. There are several threads on methods of pulling logs with a tractor. Much of the advise in those threads would be helpful regarding the placement of your chain. There are safety issues to be considered as well and the threads discuss various points that should be helpful.
Good luck!!