Well, I've had the trunk lock re-pinned so that my key works, and the trunk lock motor works. I just can't figure out what the arm at the end of the trunk lock motor is supposed to hook on to.

When I bought this car, the trunk was unlocked, and I could not lock it with the key I got from the previous owner, or by locking all other locks from the drivers door. It turns out she only had the valet key. Got a new "master" key from Volvo, but still no luck. A little later I found the parts bag from the replacement lock in the trunk. Off to the locksmith, and now my key works in the new lock that was put in the trunk.

Problem is that I still can't figure out the linkage for the electric lock. The Haynes manual is practically no help on this, and this is from a guy who can successfully put together bicycles and swing sets from the supplied directions!!