Ah yes, the invisible wires leading to the mast. When I bought my 1989 E38 the PO was not very knowledgeable, and when he had the yard pull the mast one year for storage no one knew about those wires. Result was that they ripped the wires right out of the mast. The repair was very poorly done, and almost looks as if the yard tried to cover it up. Replacing all the mast wires was one of my first tasks as the new owner once I dropped the mast myself.
And as mentioned, there is nothing holding the mast down other than the rigging. But do look out for the coax for the antenna, which usually runs out the base of the mast and through the mast step (which is where most boats also have the rest of the electrical wiring). Our routine was to stop the mast lift after about one foot to allow disconnecting of the coax connector on the antenna coax.
Note that the balance point for the mast on our 38 was about 3 feet above the lower spreaders. If you tie just under the lower spreaders it will work, but it makes the mast a bit top heavy and difficult to handle when you lay it down.