diff --git a/csaxs_bec/device_configs/frontend.yaml b/csaxs_bec/device_configs/frontend.yaml
index 966248b..2471ac8 100644
--- a/csaxs_bec/device_configs/frontend.yaml
+++ b/csaxs_bec/device_configs/frontend.yaml
@@ -93,7 +93,61 @@ sl1yt:
   - cSAXS
   - frontend
 
+sl1xc:
+  description: 'slit 1 (frontend) x center'
+  deviceClass: ophyd.EpicsMotor
+  deviceConfig: 
+    prefix: 'X12SA-FE-SL1:CENTERX'
+  onFailure: raise
+  enabled: true
+  readoutPriority: baseline
+  readOnly: false
+  softwareTrigger: false
+  deviceTags:
+  - cSAXS
+  - frontend
 
+sl1xs:
+  description: 'slit 1 (frontend) x size'
+  deviceClass: ophyd.EpicsMotor
+  deviceConfig: 
+    prefix: 'X12SA-FE-SL1:SIZEX'
+  onFailure: raise
+  enabled: true
+  readoutPriority: baseline
+  readOnly: false
+  softwareTrigger: false
+  deviceTags:
+  - cSAXS
+  - frontend
+
+sl1yc:
+  description: 'slit 1 (frontend) y center'
+  deviceClass: ophyd.EpicsMotor
+  deviceConfig: 
+    prefix: 'X12SA-FE-SL1:CENTERY'
+  onFailure: raise
+  enabled: true
+  readoutPriority: baseline
+  readOnly: false
+  softwareTrigger: false
+  deviceTags:
+  - cSAXS
+  - frontend
+
+sl1ys:
+  description: 'slit 1 (frontend) y size'
+  deviceClass: ophyd.EpicsMotor
+  deviceConfig: 
+    prefix: 'X12SA-FE-SL1:SIZEY'
+  onFailure: raise
+  enabled: true
+  readoutPriority: baseline
+  readOnly: false
+  softwareTrigger: false
+  deviceTags:
+  - cSAXS
+  - frontend
 #####################################
 #### XBPM ###########################
 #####################################