I have coresponded with you before.
Barkingdogg in Newcastle, OK. My Caravel
had a dead bolt lock on outside & in, but was a thumb turn on inside & outside. When I took it apart, it only had about a 3/8 s hole, with a flat bar going thru to operate dead bolt. I bought a dead bolt with lock on the outside & thumb turn on the inside at Mobile Mart on Shields Blvd. just south of south 240 in OKC. It married with the existing bolt and mechanism that goes into the door jamb to lock it. Therefore I can now lock it from intruders (with key) & also lock it (with key) on both locks going down the road.
If I can be of assistance let me know.