I was about to reinstall a Honeywell RTH8500 thermostat when I noticed that the jumper between the R and Rc wires was missing. As I do not have an Rc wire, I need the jumper to be intact. As it is only a jumper I am assuming that a simple workaround would suffice but I see no way of doing that while still being able to connect my necessary R wire. The wire receptors do not appear to be large enough to take two wires in the same slot. Suggestions and/or a simple diagram would be appreciated.
Following your advice I bent a short piece of wire into a U and managed to insert one end of it into the slot with the R wire. I connected the other end of the U to the vacant Rc input. Everything now seems to be working perfectly. Many thanks.