What's going on under the hood on my fuse box?

Looks like electrical grease on the ABS1/ABS2 and some other connector within the fuse box?
Should I just unplug these and clean them or is something else going on I should address? BTW no ABS lights come on the dash.

Pretty sure that’s old dielectric grease. I think you can clean it out but “if it isn’t broken, don’t fix it”.