here is the photo of the incoming (Bottom Left) to two RCCB

Bought from two different place , why color different?

Dont la like this bro 

i not sure i clamp wrong or it really so low , 2 Airconds 2 WH this two is the biggest power eater i guess . Cuckoo , Air Fryer , Washine Machine and Fridge all On .

Or

i just follow back Developer 63A    because i planning to change all to HAGER . and mayb the 10mm to 16mm

Advice please 

Sent , but no reply from them since ever haha
Yes i bought from Authorised Reseller / Distributor shop (Pentapower(M) Sdn Bhd (Puchong) & (CPE Electrical Supplier via Shopee). But they say use 4.5k is enough . Or should i change all to 6k as developer provide?
Ya i redo the reading correct already , 1 WH running around 14A .... Incoming is 16mm from meter but thn 10mm to both RCCB (100mA & 30mA)

For my WH , Developer no give RCCB / RCBO i added myself for safety .

means only use 1nos 30mA whole whole house?

The empty space is 2 nos RCCB 0.01 .. not yet install when snap this

My neutral bar is separated by two sides , can i connect both side by tapping a wire? or need to replace a longer bar

U mean connect with a 16mm cable like photo ? 10mm boleh?

16mm i got spare , so i just tap the wire to connect the both bar ya

just notice i dont have cutter size to cut 16mm haha , any recommendations for the cutter?

100mA removed and all now using 30mA RCCB

in the UK they have moved on to RCBO. No more RCCB as it is included in each circuit. So if there is leakage only individual circuit would trip not the whole house. In Malaysia RCBO is available for Water heater (20A, 10mA trip), the rest not widely available yet or price too expensive.