Linking attributes between EWM and MEC

Please, I need your help with open point related to export between MEC and EWM,

<o:p> </o:p>

I need to update attributes inside the work item of EWM example: <o:p> </o:p>

When I import template inside EWM,  the description of the work item is updated with link to the MEC website with details about the task, I want to write in other attributes as well. <o:p> </o:p>

<o:p>   </o:p> So to add more information about work item like safety related, I created attribute called Safety in MEC and I added it to the activity and I create attribute inside the work item in EWM with the same name, but I was not able to link them.

<o:p> </o:p>

As I can see the description of the item in MEC is linked to the description in the EWM, How is this link created, I want to do the same way with other attributes. <o:p> </o:p>

Is there also away to make the attribute not editable after they are written by MEC, example: after setting work product as ASIl: B, team should not be able to change this information when they work on the task <o:p> </o:p>

<o:p>   </o:p>