Mains terminal block, the connection between the fixed wiring and the appliance for some cooktop & oven models. These usually burn out due to poorly tightened connectors within the block, its important to have these fitted by a qualified electrician. Designed to be connected with circular flexible cable. 
INALTO: ICC604K
EUROTECH: ED-CC604K
EUROMAID: GCE6000, GCE6000.1, BCE6001, BCE7001, GCE7000, HCC60
ARC: ACC6 ACPC 

Should be possible to replace this with TB105 if not available