I'd like to install the Tac!t system in the Connbox output cable. Is this possible?

This is a custom workaround, and in order for it to be undertaken, you will need to purchase the individual PCB (holding Tac!t's filter circuitry) that normally fits inside the unit's XLR-3M connector. You can then de-solder the XLR-3M Connbox output cable connection and add the Tac!t.

Product details for this special order are as follows: 

Description: Tac!t (PCB Only)
Order Code: 017029 

Once purchased, this is a strictly non-return item since it needs to be soldered in place by the customer. For soldering instructions/schematics, please contact a Rycote Technical Specialist here.

Important: The Tac!T PCB only fits inside the Neutrik XX-series of 3-pin XLR connectors.