Recirculating pump,CTM 61/A-R, 230V 50Hz

Heat the fittings from the old pump with warm air gun to loosen them

Transfer them to the new pump with new sealing on the threads

Remove the mounting bracket from the old pump

Place the new inside the unit

Mount old hoses to fittings (still loose pump)

Now pump can be positioned inside unit, given the hoses has a natural bend and don't cut/close

Now drill new holes thru the unit sheet metal plate that fits the new pumps mount holes

Mount using existing bolts/nuts 

Test by circulate with glycol, that fittings are not leaking before closing the cabinet