Peplink Balance 580 load balance with HD4 Quad LTE Mobile Router

Can someone help!!! I have a Peplink Balance 580 can i attach SDSLM circuit to this or possibly ANXM, these are UK copper based circuits! or do I need some other bit of equipment. The idea is to bond SDSLMx4 plus ANXM (Voice) as a solution. What im thinking is to connect the SDSLM routers internal lan ports to the 580’s WAN connections.

any advice