Tascam 85-16B MS-16 and others Track arming unit complete

This unit is crazy rare alone , I have some parts that can be used to make one, its normally on the main unit trolley, but some people used the mobile remote cart that had the track arming unit, the remote and the autolocater, Over time these got seperated or parts were sold off.

Sold as you see it , guranteed I think this might work on the 85-16 as well, and maybe the oherr units , but I am not sure, as no part number I could see