Pay me now or pay me later!!
It is possible that the prev. owner installed these items, radar wind communications, and had intentions of possibly adding a junction at a later date when the mast needed to be un-stepped, or was installed by someone that simply installed instruments, and saw the chance of not making a complete job,and not installing a junction block, which should have been done at time of installation. Either way you only have two choices, you can disconect all the wiring at instruments and re-pull them at time of re- stepping which I think is a lot of work when eventually someone will need to add a junction at the base of the mast. Choice two, which I think is the correct choice is to add a junction area at the mast base. I have cut and added junctions for radar and communications, but the wind instruments work from resistance which may alter reading after a splice is made. It may be safer to contact the respective instrument companies and ask if the leads can be cut and re-joined with a terminal block. If the lines can be cut it is not as complicated as one would think. Just stick to the color code of the wires and all will be well. Just in case check with the companies and ask for specific advice for each instrument. Hope this will help. Don Flowers Rockport, Tx.