Option 1: The entire CRC cooler will sit inside the cryostat's 4K radiation shield, fixed to the 4K plate.
This means that the 'hot' pumps of the CRC sorption cooler will require radiation shielding. The radiation shield can be designed to mechanically support the cooler, or, as in this picture, mechanical and thermal interfacing can be separated.
In this configuration the electrical connector to the CRC cooler will be on the 'cold' side of the sorption cooler's mainplate.