Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: What kind of end connection is it?  simple wire or is there a jack and if so what kind?
Document: The tunable loop antenna, the instructions booklet, and the external connetcion wire.The wire has a mini (1/8") male, mono jack on one end and 2 bare wires on the other. If you have a radio like mine that has a 1/8" female jack (as does this antenna) then this wire won't easily work for you. You'll have to splice a male 1/8" jack to the bare wires before you can plug it into both the radio and the antenna.
As stated it can be set up without wires. Just deal the antenna to the frequency and place it in a position to get the best reception. The antenna comes with a wire with a jack on one end to plug into the antenna and bear wire ends on the other. If your radio has a jack input you will have to obtain a correct wire with jacks on both ends. Check your radio for the type of input if you want to use  the wire inputs. As stated it works very well wireless.
It's fairly small (about 10 inches tall) which means it will fit most places. Of course, it would work better if it was twice as big, but it's a good compromise.It is kind of expensive for 3 feet of wire, a cap, and a plastic case, but it pretty well does what is claimed.
A station at 540 khz that did not register on the S meter came up to a S5 with this device on the Sangean. Again, I did not use the direct wire connection.You will need to experiment a little with placement and orientation of both the radio and AM-1000 to get good results. This is not something that you just set next to a radio. You need to find the best location and orientation.The add says 'pin and dot' tuning.
This is a very good antenna for improving weak AM broadcast signals. It even has a connector to plug into AM radios with an external antenna jack. This is a excellent way to improve AM HD reception if you have an HD radio.
Plain and simple, this item doesn't work. Honestly, it made absolutely no difference in radio reception in my home, even after following all their suggestions. Junk.
Of course, there are some drawbacks to listening to AM, such as interference when certain appliances are used, but this has nothing to do with the quality of the antenna. I use the AM antenna jack that is provided on the radio. The radio came with a small loop antenna which made me think initially I would be wasting money, however there is no comparsion between the two. Once you tune the antenna to the station you listen to the difference is obvious. Bottom line, it works fine.
This loop antenna made the difference between receiving AM stations or not! It is simple.........just place near the radio......It doesn't even need to be connected to anything (electric,radio, nothing ) I'll be buying another one for a second AM radio.
Antenna does not work at all. It didn't matter how it was located or if it was used with a cheap radio or a high end radio. No change. Don't waste your time or money. Best bet is to listen to FM
This antenna was so simple to use: just took it out of the box and set it next to the radio, then tuned it to the frequency I wanted. I'm now able to pick up my favorite AM station which is on the other side of a range of mountains and a couple of hundred miles away! The antenna arrived on time and in perfect condition. I'm a very happy camper.
Answer: A 1/8" jack connects the antenna wire to the Terk. The other end is pos/neg bare wire.