The two lines coming from the tank are oil and gasoline. You can see the hand oil pump handle above the oil line. The line leading from the rear of the engine to the top of the carrier is perhaps a control cable that is just sitting there, as the machine is likely in for repairs. On the Bradbury, the two round markings on each end of the tank are formal portraits of the two Bradbury bros. who built the machines.
I'm afraid I don't have an e-mail address for Mike Wills. He has around twelve Bradburys.