Margret you need to load your picture onto this site, if you look at the top left in the box "my account" you will see "my photos", click that and create an album and then post a reply and click the little black camera icon at the top of the reply box to include the photo.
I suspect your husband wants to try and match the good quality Myford switch rather than have to alter the housing to take a generic NVR switch, your photo will confirm this.
J