As Etienne says, the remote compass installation instructions are part of the main EFIS install guide, they are not separate. If you don't have your original install guide, they can be downloaded from our support area:
Make sure you use the correct install guide for the EFIS-D10 or EFIS-D10A as they are different. Also, make sure the EDC you bought matches the instrument you have (EDC-D10 to EFIS-D10 and EDC-D10A to EFIS-D10A).